Hiking Xtra - Dri-Wright/MicroSafe Inner Layer. Solara Acrylic Outer Layer. Hidden Terry Looped Acrylic Protects Foot from Outdoor Rigors. Stabilizer Zone in Arch for Better fit and Control. Anti-Blister System. Looks Great Too! Content: Inner Layer: 55% Dri-Wright, 15% MicroSafe, 30% Nylon/Outer Layer: 72% Solara Acrylic, 24% Nylon, 4% Lycra |