Pro Feet Acrylic All-Sport Tube Socks in Forest Green Size X-Small (5-7). Acrylic for comfort and durability 1 x 1 rib for better stay up performance Lightweight non-cushion foot Durable 83% Hi-Bulk Acrylic / 9% Nylon / 8% Elastic Size: 5 -7 Pro Feet Acrylic All-Sport Tube Socks in Forest Green Size X-Small (5-7)... - Pro Feet Acrylic All-Sport Tube Socks in Forest Green Size X-Small (5-7).