HappyStep Lamb’s Wool Sheepskin InsolesOur sheepskin insole has its unique 3-layer design. The top layer of the insole is made of genuine high-quality Lamb’s wool, which is integrated with the middle layer: 100% real genuine sheepskin. The bottom layer is a comfort felt sole. It is an ideal shoe inserts for rain boots and snow boots and any other winter shoes. The soft and cozy lamb’s wool holds the body temperate; the real sheepskin promotes better air circulation; the felt sole blocks the cold from outside. ALL IN ONE, HappyStep lambswool sheepskin insoles build up a warm and cozy environment inside your shoes for your feetFeatures Genuine lambswool super soft, cozy warm and comfortable Real Sheepskin provide better air circulation Felt soles block cold air and holds the warmth Unique 3-layer design make your feet supper comfortable in the winter while provides excellent odor control There are various sizes available. You will find your custom fitInstruction for Use Remove the current insoles from your shoes Insert the Happystep Sheepskin Insoles into your shoes (do not put both the new insoles and your current insoles in the shoes at the same time as it would be too thick and wide) It is recommended to replace your insoles in a regular basis (every 3 months is ideal) 100% Satisfaction Guarantee! You'll totally love it or you get all your money back.