The Nash ZT Lite Crew Socks 2 Pack are built for comfort, using a soft, controlled stretch fabric with an internal breathable mesh and a supportive arch band. The sock length is designed so you can pull them over jogger cuffs, helping to keep mosquitoes and ticks away from the skin. They are machine washable. Available sizes: - Small (UK 5-8 EU 38-42) - Large (UK 9-12 EU 43-47)