The Dex Shell Ultralite Biking Socks are waterproof windproof & breathable ankle socks with high vis cuffs that are lightweight & supple with a cottong lightweight lining they offer an excellent level of weather protection ideal for biking as well as running & walking in the warmer months All Dex Shell waterproof socks have a three layer bonded construction which features a waterproof breathable Porelle reg membrane in-between a flexible drip-dry outer & in this case a comfortable cotton/nylon lining for maximum comfort & protection These Ultralite waterproof socks are less bulky lighter & more supple than traditional waterproof socks & have been one of our best selling Dex Shell socks so far