Hilly Twin Skin Classic Sock Newly Improved fo greater performance • Flat seamless toe construction to help prevent blisters • Inner sock is Meryl® SkinlifE with permanent anti-microbial properties • Double sock construction absorbs friction, whilst the Meryl® SkinlifE inner sock wicks moisture to the outer cotton sock, keeping skin dry • Outer sock contains Lycra® for better fit • Arch grip section for optimum fit • New W heel for better fit • Soft touch reinforced heel and toe • Pre-shrunk and new improved fit • New 'VentFlex' panel on front of ankle for improved ventilation and flexibility • Longer leg length