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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
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