Axolom STP & Packing boxer is a soft breathable bamboo fabric packing underwear. This comfortable gear is designed for 2 options, no matter you use a FTM STP or FTM Packer. It provides two layers in the inside and outside. Between the two layers, there is an embroidery O ring ( NOT silicone ring), which holds the STP packer in position. Providing a cover to the front of the underwear through which STP PACKER is comfortable to urinate and use regularly.  The Axolom STP boxer has a pouch inside which keeps it away from our genital. It's a very safe point for packing.       Material: 95% Bamboo, 5% Elastane.    Color: Black. Wash Cold, Tumble Dry or Medium Low.