Mystery Biker Flex

Finally, comfortable active underwear for athletes. Biker Flex is our classic 9” inseam boxer brief in a lightweight, sweat-wicking, and supportive recycled poly fabric. 

• Active underwear made for movement
• 9" inseam, our longest length
• Medium thigh compression
• Sweat-wicking and quick-drying active knit fabric
• Sleek and smooth for friction-free fit under clothing
• Organic cotton gusset for breathability and hygiene
• True to size
• Designed for a close fit