A pair of these quality washable lambskin insoles will provide your feet with natural comfort and relief through all seasons. Wool keeps you cool and dry in the summer and warm in winter because the natural wool fibres allow air to circulate under your feet. They also do not absorb moisture & bacteria like artificial materials, and wick moisture away from your skin. Made of lambskin fleece with leather backing, use these quality insoles in a variety of footwear. Wool fibre length approx. 17-20mm.