Swiftwick Aspire - Knee High Size:Medium Ultra-light fit feels like a

Ultra-light fit feels like a second skin

Solid-core EVA foam roller is more durable than standard polypropylene rollers that can break down and become soft

Reinforced heel and toe improve long-term durability

while Infiknit™ fibers reinforce durability where you need it most

Engineered for rugged trails and cool climates with reliable warmth and support

Swiftwick Aspire - Knee High Size:Medium Ultra-light fit feels like aFull length support with zero distractions. The Swiftwick Aspire Knee High sock delivers firm compression, minimal cushion, and knee high coverage for endurance athletes and training environments where muscle support and moisture control are essential. Designed to reduce fatigue and enhance stability from foot to calf, it's ideal for running, cycling, triathlon, or recovery. Knee high 12 cuff supports the lower leg and aids circulation during long