Unisex F4 Tech No Show 3-pair pack (White) Size:L it shrinks as you drink

it shrinks as you drink to minimize water movement and it can be used with or without the tube

Breath Thermo captures escaping body vapors and generates heat for overall increased warmth during activity

letting you concentrate on your race

OOFOS are made in whole sizes

Unisex F4 Tech No Show 3-pair pack (White) Size:L it shrinks as you drinkDesigned to meet the demands of race day athletes, the F4 utilizes to provide compressed venting and moisture wicking in the most extreme conditions. Made with Sorbtek, this sock channels moisture away from the foot, keeping it cool and dry. Anatomical left right foot construction allows for precise fit, while a unique cushioning system provides comfort in specific pressure areas. Achilles protection reduces blistering on the back of the foot, and a