On Ultralight Mid Sock White / BlackThe Ultralight Mid Sock is a performance running sock with ankle coverage to keep the dirt and dust at bay. Lightweight and protective, thick heel and toe padding combines with anti-blister patches. 61% Recycled Polyamide, 35% Recycled Polyester, 4% Elastane Ankle Coverage Ultra Lightweight Padded Arch Support Beathable Mesh Instep Style Code: 356.00867 001.