Reebok Mens Performance Boxer Briefs - 3 pack (Medium, Navy/Frost Gray/Black Print) 100% polyester Body- 90% polyester, 10% spandex; Mesh pouch- 100% polyester. Breathable contoured mesh pouch ( size M ) Microfiber waistband with authentic Reebok logos Performance fabric for comfort & fit, Tag free for comfort, Reebok logo at hem Machine wash cold.