Columbus Winter Insoles Free Size 22-28cm Despite feeling dry, these insoles offer excellent heat retention. The top surface uses 70% Ecosite, which has about 3 times the moisture retention of cotton and about 1.2 times that of wool. Ecosite does not absorb water into the fibers themselves. It releases sweat and moisture to the outside without trapping them inside the material, so your soles always feel dry and fresh even when you sweat. Ecosite is a material that consumes fewer resources and energy. It is also easy to reprocess and is an ideal material for recycling. You can cut it to fit your shoe size. These are cold-weather insoles with the texture of wool and excellent heat retention. Cold days will continue. Shipped via Yu-Yu Mercari service, will ship in 1-2 days. The packaging has some minor scratches, etc. Thank you for your understanding regarding home storage.