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Underwear

FTM Packing Underwear for All-Day Confidence

Regular underwear wasn't designed with packers in mind — it lacks the structure to hold a prosthetic securely, leading to shifting, slipping, and constant readjusting throughout the day. Purpose-built packing underwear solves this with integrated pouches, STP-ready openings, and fabrics that keep everything in place from morning to night.

Emisil carries TRUHK packing underwear — crafted from ultra-soft bamboo fabric with a patented 3-layer pocket system designed specifically for soft packers and STP devices. Choose between boxers and briefs, find your size, and pack with zero worries.

Why Packing Underwear Matters

Standard underwear can't handle the weight or positioning demands of a prosthetic. In public restrooms or gym changing rooms, one wrong move and your packer shifts — or worse. Dedicated packing underwear features built-in pouches that cradle the prosthetic, prevent fall-out, and allow natural movement. For STP users, the front-access design means you can use a urinal discreetly without fumbling. It's the difference between packing with anxiety and packing with confidence.

TRUHK 3-Layer Pocket System

Layer 1 Interior pocket — Securely tucks your packer into place against the body. Keeps the prosthetic from shifting during movement.
Layer 2 Center O-ring panel — Pull the shaft through the opening to lock the STP packer in the correct position. Prevents rolling or turning throughout the day.
Layer 3 Exterior pouch — Provides room for a natural hang and drip protection. Open horizontal front gives easy access when nature calls.

Compatible with all Emisil soft packers and STP devices.

Boxers, Briefs, or Harness?

Packing Boxers

Full thigh coverage with a relaxed fit. Best for everyday comfort, work, and casual wear. The longer leg prevents ride-up and keeps the packer stable during walking or sitting. Made from bamboo — breathable, soft, and naturally hypoallergenic.

Best for daily wear
Packing Briefs

Compact, snug fit with minimal fabric. Great under slim-fit pants, shorts, or athletic wear. The tighter cut holds the packer closer to the body for a discreet, low-profile bulge. Same bamboo fabric and 3-layer system as the boxers.

Best for slim fits
Packer Harness

Strap-based system worn under any underwear. Maximum hold for sports and high-activity situations. Gives you freedom to wear any underwear brand you prefer on top. Best paired with a soft packer for active use.

Best for sports

Size Guide

TRUHK packing underwear uses standard men's sizing. To find your fit, measure your waist at the narrowest point (usually just above the hip bones) and compare with the size chart on each product page. Alternatively, lay a well-fitting pair of underwear flat and measure the waistband from edge to edge — double that number for your waist circumference.

Sizes available: S through XL — covering waist sizes from 28" to 40"+. For the best fit, always check the product size chart before ordering.

Frequently Asked Questions

What underwear works best with Emisil STP packers?

TRUHK packing underwear is fully compatible with all Emisil STP prosthetics. The 3-layer pocket system holds the STP funnel securely against the body through the interior pocket, locks the shaft in position with the center O-ring panel, and provides an open front pouch for quick, discreet access at urinals. Both the boxer and brief styles offer the same STP functionality.

Do TRUHK boxers work for daily packing?

Yes, TRUHK boxers are specifically designed for all-day wear. The bamboo fabric is breathable, moisture-wicking, and naturally hypoallergenic, so they stay comfortable for 12+ hours. The built-in pouch keeps your soft packer or STP device stable through sitting, walking, bending, and even light exercise without needing readjustment.

What size packing underwear should I get?

TRUHK uses standard men's waist sizing (S through XL). Measure your natural waist at its narrowest point, typically just above the hip bones, and compare with the size chart on the product page. If you are between sizes, we recommend sizing up for comfort. Packing underwear that is too tight can cause the packer to shift upward or press uncomfortably against the body.

Can I use packing underwear for swimming?

Packing underwear can serve as your secure base layer under swim trunks. Wear tight packing briefs as the first layer to hold the packer in place, add compression shorts or a second snug layer if needed, then put your regular swimwear on top. Bamboo fabric dries relatively quickly, but for frequent swimming you may want a dedicated pair. Silicone packers handle water exposure without any issues.

What is the difference between packing underwear and a harness?

Packing underwear is an all-in-one garment that replaces your regular underwear and holds the packer using built-in pouches. A packer harness is a strap-based system worn underneath any underwear, offering maximum hold during sports or high-impact activities. Most people prefer underwear for daily comfort and convenience, while harnesses are better for intense physical activity where extra security is needed. You can also combine both: wear a harness for the hold, with packing underwear on top for added stability.