Brief STP/Packing TRUHK Underwear have a unique 3 layer pocket to securely hold your STP/soft packer in place.

Layer 1 (Interior pocket): Securely tuck in your STP/packer. 
Layer 2 (Center panel): O-opening to pull shaft through and keep your STP/packer from turning. 
Layer 3 (Exterior pocket): The contour pouch has room to tuck the shaft giving a natural hang. The open horizontal front pouch gives you easy access when nature calls.

MATERIALS & CARE: 
- 95% Cotton, 5% spandex. 
- Machine wash cold, tumble dry low. 
- Note: O-ring is not included in packing underwear.