- Size: ND • Made with short-haired sheep wool and polyester, these insoles offer durability and warmth. • Designed to keep your feet warm and comfortable even on the coldest days. • Provide all-day comfort, ideal for prolonged use both indoors and outdoors. • Easy to install: simply place the insole in the shoe and secure it with the external rivets. • Versatile and adaptable to different types of shoes, perfect for winter. • Measurements: 24 x 9.5 cm (9.45 x 3.74 inches).