- Size: One size • Includes 2 pairs of thermal fleece insoles to keep feet warm in winter. • Made with 100% natural wool, they are extra thick and warm. • Suitable for any type of footwear: sneakers, winter boots, rain boots, leather shoes, and work shoes. • Non-slip sole thanks to natural latex foam, preventing them from moving. • Cushioned step with extra thick lining that absorbs foot movement. • Provide a pleasant temperature for the feet, neither cold nor hot. • Soft to the touch and non-itchy, ideal for winter.