Profoot Lambswool Insoles Profoot Lambswool Insoles give your feet extra warmth & comfort. They are perfect for use in shoes, boots, wellies & slippers. They provide extra warmth in the winter & are cooling in hot weather. The pure lambswool top is cosy & comfortable, whilst the cushioning anti-slip, latex bottom layer keeps the insole in place. The latex is also impregnated with Ultra-Fresh for added freshness. Directions Using guidelines, trim to size with sharp scissors. Place in footwear printed side down. The lines are meant as a guide only. We suggest cutting larger than your shoe size initially, & then trimming down to the correct size. Machine washable at low temperatures. Dry flat. Do not leave on radiators.