Pack includes 3 pairs of performance boxer-birefs underwear. Elastic comfort waistband. Fly front. Breathable, butter-soft performance jersey fabric. Breathable mesh gusset lets you vent. Engineered with Built-In Flex stretch technology. Equal parts comfort & movement. Go-Dry Cool wicking technology helps keep you cool, dry & comfortable. Flat-stitched seams prevent chafing. spandex 6% polyester 94%