Design PhilosophySocks can make or break an outfit, and it is easy to see that the clean, contemporary styling of the Pro SL Sock II will be a welcome addition for even the most discerning wearer. These socks certainly aren\'t style over substance however. Fine Meryl fibres create a soft to touch, breathable sock that is also resistant to wind and rain. Meryl fabricThe Pro SL Sock II utilises Meryl fabric containing particularly fine fibres, producing a lightweight fabric characterised by soft handle, breathability and resistance to wind and rain. 90 day satisfaction guarantee So confident are we in this product that, if you are not entirely satisfied with it then we offer a no-quibble refund or replacement policy within 90 days of purchase.