NATURAL LAMBS WOOL FELT MATERIAL -- High density material , High-quality shoe insert. and dry give the perfect comfort and heat quantity to your feet. anti acarid and deodorization. | SUPER WARM-- Warmer then wool fur insoles, lambs wool felt makes your feet super warm, perfect boot insoles in cold winter. | ERGONOMIC THICKNESS -- ( 6MM ) is the most comfortable insole, giving the support for every pairs of shoes. Allow our feet a little rest from long shopping trips and extended walks through the metropolis of the world. | WASHABLE INSOLES -- Hand washing & air dry them flat on a towel. | ADJUSTABLE SIZE---No hemming. could be cut according to the actual length of your shoes,Ideal for all kinds of shoes.