Ultra-Thin Construction: Lightweight design for a barely there feel. Locked-In Fit: Keeps the sock securely on the heel for an adjustment-free fit that won't fall down. Strategic Mesh Panels: Located on top of the foot for enhanced breathability. Moisture-Wicking Material: Wicks sweat and dries very quickly. Odor Control Technology: Reduces odor in the sock. These take your sock game to the next level by being light and breathable, but still giving you arch support.