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Sheath 4.0 Boxer Brief Red

Regular price $46.00

Tax included


Only 2 in stock

Sheath underwear were born out of a need to put a barrier between shaft, balls and thighs, to create a space for cis men’s junk to be separate & supported.

Luckily, this design is also great for packing!

The Dual Pouch includes a pocket to support the balls of your packer, a circular seamed hole for the shaft to sit through and a fly for quick access. This also comes in handy if you are using an STP.

Sheath underwear is made from a 92% Modal and 8% Elastane fabric blend. Modal is a semi synthetic material made from the beech tree. It is an antimicrobial, breathable, and very flexible material. It is very soft, drapes well, resists creasing, and has a smooth lustrous finish.

The Sheath 4.0 sit lower on the thigh than the Sheath 2.1


  • 5" inseam standard boxer brief leg length, mid thigh
  • Dual pouch with vertical fly
  • Discrete athletic waistband

Size Guide 

  • Small - 28-30
  • Medium - 32-34
  • Large - 36-38
  • XL - 40-42
  • XXL - 44-46
  • XXXL - 48-50

How to Measure

Size guide is based on hip measurement, where the underwear naturally sit (you can use your jeans size for reference)

For the best fit with, it will depend on our build and if your weight fluctuates. The Sheath team recommend that If you're an athletic slim body type, with thinner thighs and smaller butt, keeping to your usual size would be better. Especially if your weight stays pretty steady. If you're on the thicker side, with larger thighs and butt, a larger size would work better. The underwear should fit like a second skin, they should fit snug but not tight. 


  • Hand or machine wash on a cold gentle cycle, seperate or with similar colours
  • Use mild soap and no bleach or fabric softener
  • Tumble dry on low setting or lay flat to dry
  • Do not iron

Keep in mind that, although Sheath are great for packing, they aren't specifically designed for packing. If you are after a packing underwear which is made specifically for packing, check out the Spareparts Pete Spareparts Pete range.

Due to the intimate nature of underwear, we are unable to offer returns or exchanges on these items.