That was many years ago, I still remember the very first time I used a STP, at that time there is even no name for it. We just have some purple silicone things that help people be able to stand up and pee or some penis sleeves I have to cut the opening myself with a knife.
I still remember the first time I used it, I was overwhelmed. I was anxious and uncomfortable, my face was blushing for sure. It was leaking everywhere and I was ashamed, so I ran back to my room and hides it in a box under my bed, but I didn’t give up, when I was in dysphoria sometimes I will take it out and try it again, but it always ends up the same.

Years later, things develop fast and I almost bought all the stps I can have at that time. being able to Stand up and pee, it becomes a symbol for me, especially in my culture, it is something society think very important for a man (I live in a super conservative area). It is about fit in and about be my trueself.

Months ago, I just learn a word that can describe that feeling and that situation: stay stealth.

I know it is hard to stay stealth when you have too many things to worry about. But I hope at least with what I build, you can relax a bit and I want to make it simple. Just like, you don’t need to worry about it. [I type it on my phone without translation, might have typos]

Full article here: https://heimoritranssupply.com/heimori-one-stp-packer-design/

Here are some of the design decisions behind ONE:
• 12 cm shaft — a deliberate middle ground between usable reach, realistic proportions, and staying discreet under clothing.
• Wider cup contact edge (≈1.5–2 cm) — easier to feel against your body, more forgiving when positioning, and designed to better maintain the shape of the functional cup under pressure.
• Compact, body-focused cup — instead of simply making the cup as large or deep as possible, we focused on giving the urethral area enough room while keeping the overall system compact.
• Continuous drainage — the cup, shaft, and outlet were designed as one drainage pathway, with the goal of keeping urine moving instead of letting it pool inside the cup.
• Vertical, non-circular outlet — designed to balance flow capacity, stealth, and a more natural-looking stream.
• Firm where it needs to be, soft where you wear it — different levels of support help the functional area maintain its shape while allowing the rest of the prosthetic to move more naturally during everyday wear.
• Pack up or pack down — ONE was designed to work in either direction, depending on your anatomy, underwear, clothing, and personal preference.
And one of the things we cared about most:
We wanted ONE to handle a full, natural urine flow without requiring you to intentionally slow down or hold back.

We tried to make the whole system work together — flow, positioning, stealth, realism, comfort, and everyday usability.

The next round of HEIMORI products is already in the works and coming soon.
We’re also preparing a new community poll this week. We want to hear what you think we should build next.

What feature, design, or product would you like to see from us?

Hi, I’m Heimori, the founder of HEIMORI Prosthetics.

After months of community feedback, prototypes, water-flow testing, and a lot of small adjustments, STP ONE is now available for pre-order.

Our idea behind it is simple:

With HEIMORI STP, Stay Stealth is Simple.

STP ONE was designed for diverse anatomy and everyday use, especially for people who are new to STPs or want something simple and discreet.

Size

Shaft Length: 4.72 in | 12 cm

Shaft Diameter: 1.38 in | 3.5 cm

Cup Width: 2.56 in | 6.5 cm

Weight: 7.41 oz | 210 g

Adhesive Tab Thickness: 1.5 mm

What We Focused On

Wider Rear No-Spill Lip: A wider rear edge is designed to help reduce urine escaping around the back of the collection area before reaching the drainage channel.

High-Flow Channel: The internal pathway is designed to handle a stronger stream and move liquid efficiently through the packer.

Large Hidden Opening: A larger drainage opening supports higher flow capacity while remaining discreet from the front and side.

Lightweight, Everyday-Ready Design: At approximately 210 g, STP ONE is designed for everyday packing as well as stand-to-pee use, helping reduce unnecessary weight and bulk under clothing.

Thin 1.5 mm Adhesive Tab: An integrated thin attachment tab provides an option for users who prefer adhesive support without adding excessive bulk to the body-contact area.

Designed With Beginners in Mind: STP ONE was developed with first-time STP users and a wide range of anatomy in mind, with particular attention to positioning, drainage and discreet everyday wear.

Pre-Order

Regular Price: $238

Early Pre-Order Price: $199

Use code: ONE199

Your first-run pre-order also includes:

1 × Adhesive Sheet Set

1 × Travel Powder Container + Puff

Free Worldwide Shipping

Pre-order STP ONE:
https://heimoritranssupply.com/products/ftm-stp-one/

Only 20 spots are available for this first production run.

We’ve received a much larger response than we expected, so the current estimated production time is around 45 days before shipment.

See More Details About STP ONE

Real-life STP ONE Demo

https://youtu.be/zC3eVCeECPw?si=efE4S4L-IaWZyiDx

STP ONE Water Flow Test

https://youtu.be/f2rLLxAs-Ls?si=EEULWQ6MvsaLzFhS

Follow HEIMORI

You can also follow us on Instagram for development updates, new products, and behind-the-scenes content:

https://www.instagram.com/heimori_prosthetics/

Official Website:

https://heimoritranssupply.com/

BTW — A Little Update From Heimori's Pasture

We’ve also been working on a few things outside of prosthetics lately.

Our goat milk soap is still made in small batches, but because our own goat milk supply isn’t always abundant, we only make it when we have enough milk available.

So we recently developed a vegan handmade nettle soap as another option.

We’ve also been learning more about gua sha and body care, including its use as part of muscle relief routines after workout, and recently added our own Gua Sha Boards for full-body care.(Last pic)

It’s a little different from what we usually post here, but we’ve always wanted HEIMORI to be about more than just prosthetics — making everyday body care a little more accessible and intentional.

Thank you all for your support!

Hi, it’s me Heimori. I got a lot of message asking about STP ONE’s info. It’s almost there and I am still adjusting some details to make it perfect. So, I thought maybe I could share some adjustments that I made so far.

It is our new Frost color, I got a lot of suggestion about making Frost’s tip color less purple and add circumcised scar detail. So here it is, the detail pics.

As we promise before, STP ONE will be available on this August soon. Thank you so much for everyone’s support!

Welcome to follow our Instagram, I will post more updates. Thank you all!

https://www.instagram.com/heimori\_prosthetics/

www.heimoritranssupply.com

Hey it's me, Heimori.

I promised in my last post How to Choose the Right Color that adhesive would be one of the next topics this week, so here it is.

I've gone through basically every method of sticking a packer to my body over the last decade, liquid glue, tape rings, harnesses, DIY stuff I probably shouldn't have tried and I have say their shipping cost is quiet expensive. At some point I got tired of guessing which one was actually worth the money, so I mapped out what each method really costs per month, not just the sticker price, but what you end up spending once you consider in removers, replacement tape, and (this one surprised me) how some methods quietly shorten how long your actual packer lasts.

Now that I'm on the manufacturing side, I also understand why some of these methods fail in the first place. It's not a technique problem. Platinum-cure silicone, what most quality packers are made from, has a microscopically porous surface and slowly releases a small amount of oil over time and different company use different tactile oil/matte finish. That's just what the material does. Most tape and glue out there is made for non-porous stuff like plastic or metal, so it's fighting the material from the start. Nobody really explains this part, they just tell you to "try a stronger or different types of adhesive."

There's also a lot nobody talks about with removal, what solvent removers are actually doing to the surface over repeated use, why some tape rings shift, and why the "cheapest" methods on paper aren't actually cheapest once you factor in what happens to the packer itself over time.

I put everything into a full breakdown — every method, the real monthly cost math, what's actually waterproof, and proper skin-prep steps so whatever you use holds up better.

🔗 Full guide on Adhesives here: https://heimoritranssupply.com/silicone-packer-adhesive-complete-guide/

[NOTE: We usually post all the article in our Guide Hub: https://heimoritranssupply.com/guide-hub/ ]

What's next: continuing the series from last time —

• Proper storage and how to actually extend a packer's lifespan
• Deep cleaning and maintenance routines
• The hair-implanting technique I picked up this year
• Part 2 on undertones and color behind the scene, if enough people want it (a bunch of you asked after the last post)

In the meantime, AMA. Ask below or DM me — adhesive, skin prep, why something didn't work for you, manufacturing stuff, whatever. I'll answer what I actually know and Feel free to add anything you like to share. If you don't mind, I will cite you in our article for acedemic reference use only.

I list everything here as well in case you couldn't find my contact:

our website: https://www.heimoritranssupply.com

Instagram: https://www.instagram.com/heimori_prosthetics/

Youtube: https://www.youtube.com/@Heimori-ftmProsthetics

Hey, it’s Heimori. Happy Sunday.
I'm checking in with the community because we are currently in the R&D phase for our next life-cast STP (targeting a September launch), and Reddit is the main hub where we want raw, honest input before we officially lock the mold.
The biggest struggle we are trying to solve is one we’ve all faced: a lot of STPs either nail the function but look/feel like a bulky, rigid permanent boner while packing, or they pack flat but the STP function totally suffers. We are trying to eliminate that compromise entirely.
Here is how we are tackling this design:
1. Shape & Function: We've engineered a low-profile backing paired with a gravity-assisted, natural hang-down design. With adhesions system, It drops naturally through clothing for stealth packing but holds its structure perfectly when you need to stand to pee.

2. Anatomy / Head Style: Vote in the poll below! Cut (circumcised), Uncut, or Semi-cut (partially exposed glans)?

3. Size: Testing strictly in the 8–10cm (approx. 3.5 inches) range. We want this to be the ideal, realistic size for effortless daily wear. I want people be able to wear it for outdoor activities!

4. Material & Squish: We are running repeated "grab tests" across different silicone softness to dial in the perfect squish factor—making sure it feels natural to the touch through jeans but won't collapse during use.

Research & R&D Transparency
We aren't doing this behind closed doors. Once the votes are in from all our channels and the community here, we will post the official 3D design renders right here and instagram for a final critique before anything goes to pre-order.
If you want to see our current laboratory work and design philosophy, you can check us out here:
Our Life-cast Project Workflow: How Life-Cast Technology Makes Heimori Packer More Realistic

Color Replicating Tech: Read our newly published Ultimate FTM Skin Tone & Packer Color Matching Guide to see how we approach hyper-realism.

You can also find more details on our official website, our beginner friendly STP ONE is also in production process, will be available this August first:

www.heimoritranssupply.com

Drop your preferences in the poll, and you could also share more in the comments about your experiences (good or bad) with past STPs—packing angles, cup shapes, silicone density, whatever. Let’s build something that works for real. Thanks! 🙏

View Poll

Hey it's me, Heimori.

I've spent an embarrassing amount of money over the last decade buying packers that looked perfect online, only to have them arrive looking completely unnatural against my skin.

Now that I’m actually on the manufacturing side producing silicone prosthetics, I realize exactly why this happens so often. It’s not just about picking "light, medium, or dark." It’s about understanding your undertones, how silicone absorbs light compared to human skin, and how our phone screens literally lie to us (especially if you have Night Shift/blue light filters on). and How prosthetics picture is taken and how the company adjusts these pictures (there are some behind the scene pictures I love to share)

I decided to put all my personal experience—and the behind-the-scenes knowledge I’ve gained from manufacturing—into a complete, no-BS guide to help you stop wasting money on the wrong shades.

🔗 You can read the full guide here: https://heimoritranssupply.com/how-to-choose-packer-color/

What's next: I’m planning to make this a weekly or monthly series where I just share what I’ve learned over the years. No marketing fluff, just pure info and experience. In the coming weeks, I’ll be dropping guides on:

• How to properly store your packer and extend its lifespan.
• Adhesive vs. Harness (all the ways in the market to attach the packer to your body).
• Deep cleaning routines and maintenance.
• hair implanting skill that I just learned this year, etc.

In the meantime, Ask Me Anything!

Drop your questions below or DM me about color matching, undertones, lighting, or anything else prosthetic-related about any brand, and I’ll do my best to answer them based on what I know.

Edit: I did not mention too much undertone here because I don’t want to confuse people, but if you think our guide helpful and want to know more about all types of undertone. I would love to make part 2 and share so many details with you. Just let me know!

Edit2: I've change the vein test picture to the HD version in our link to show a clear subtle difference of vein color in different undetone.

Edit3: I just updated new picture in the link and change each skintones to match their undertones and veins. Thank you so much for everyone! It will be clearer to see the differences now.

We've finished the final prototype, and it's now moving into production. We're aiming to launch in August.

Over the past few months, we've collected feedback from hundreds of community members and used it to shape this design. Thank you to everyone who shared ideas—you helped build HEIMORI STP ONE.

Details and Features:

- Shaft: 12 cm (4.72")

- Designed and tested for beginners across a wide range of anatomy.

- Wider rear no-spill lip for a better seal and improved leak protection.

- High-flow channel for a stronger, faster stream**—no more holding back.**

- Large hidden opening that maintains high flow while remaining nearly invisible from the front and side.

- Lightweight design with a thin 1.5 mm adhesive tab for comfortable everyday packing.

Follow HEIMORI STP ONE's progress on our website:

https://heimoritranssupply.com/product-updates/

Full video about prototype water flow test:

YouTube

https://youtu.be/ofJcuPb6yuA?si=w5tNGV0nKJ4asBYa

Instagram

https://www.instagram.com/reel/Dar_uZFhR--/?igsh=M3pzaXQwb21pNGVh

Most Importantly,

- Next Sunday we'll be starting the next round of community polls.

Just like STP ONE, our next product will be shaped by the community. If there's something you've always wished existed, let’s make it happen.

We'll see you next Sunday.

Let's build it together.

Best,

Heimori

Founder, HEIMORI Prosthetics

Hi, It's Heimori.

We finally figured out hair implants for Saber.

Here are a few dic pics took by my iphone 14, so you can see how it looks in everyday lighting.

In these dicpics, our team is wearing the Saber Earth and Saber Dune with our adhesion sheets.

We currently offer both straight and curly hair, and we could customize them.

Happy to answer questions and Thank you for all support!

https://heimoritranssupply.com

Yesterday I shared a bit about our development process and received a lot of different opinions.

That's completely fair.

I think the product itself probably speaks better than I do, so I'll keep this one simple and focus on how it works (we post our full video on Youtube).

For our Adhesion System:

• Designed specifically for HEIMORI products
• Compatibility with other brands has not been tested
• Product details:
– Sheet size: 10 cm × 15 cm
– 28 USD 1 Set includes: 20 Double-Sided Adhesion Sheets & 20 Medical PU Films
•20% off your entire order when you buy a Saber Pack N Play

That's it.

Hi,

The last two months have been a lit crazy for our team.

When we started revisiting parts of our prosthetics, we thought we'd spend most of our time talking about shape, anatomy, and sculpting.

Instead, we became obsessed with things like:

Color.

Light.

Attachment.

Comfort.

The deeper we went, the more we realized something:

A prosthetic doesn't become part of your body because of how it looks.

It becomes part of your body because of how little you have to think about it.

That idea ended up changing almost everything.

Color

For a long time, our shades were simply called Shade 0–5.

Practical.

Easy.

Forgettable.

But after months of photographing silicone, comparing skin tones under different lighting, and listening to community feedback, we came to a frustrating realization:

There is no perfect color match.

The same prosthetic can look different in daylight, under warm bedroom lights, in a bathroom mirror, or even on two different phone screens.

The goal was never perfection.

The goal was to feel natural.

So instead of naming colors after numbers, we looked elsewhere for inspiration.

To the places that shape memories.

To the landscapes that stay with us long after we've left them.

Frost.

Sand.

Dune.

Clay.

Earth.

Ember.

Not categories.

Not labels.

Simply reminders of where inspiration begins.

Attachment

Around the same time, we found ourselves facing another challenge.

I started experimenting with attachment systems in early 2025, when HEIMORI was still just an idea.

What I thought would take a few weeks became one of the longest development projects we've ever worked on.

I tested countless adhesive materials, tapes, medical films, bonding methods, and combinations of all of them.

More than once, I thought about giving up.

But we kept going.

Partly because of the community.

Every message, every piece of feedback, every person willing to share their experience reminded us why we started building in the first place.

The challenge was simple:

The stronger an attachment system became, the less natural the prosthetic felt.

Every improvement in adhesion seemed to come at the cost of softness.

So we stopped asking:

“How do we make it stick harder?”

And started asking:

“How do we make it feel more natural?”

That question led us down months of testing, surface treatments, and custom material development.

The result is a new Double-Sided Adhesion Sheet system designed to keep the attachment area soft and flexible, paired with a medical-grade PU film barrier that keeps adhesive away from direct skin contact.

It's not the kind of feature that stands out in a photo.

But it's exactly the kind of detail you notice when you wear it.

We're still learning.

Still rebuilding things we thought were already finished.

But these last two months reminded us of something important:

The best product improvements are often the ones nobody notices immediately.

The ones that simply make something feel more like it belongs.

Thank you to everyone who has shared feedback, encouragement, criticism, and ideas with us along the way.

It truely means a lot to HEIMORI Team. You helped shape this more than you know.

www.heimoritranssupply.com