I waited for months before using these insoles, lack of snow. They hang well on frosty and icy ground, provided you walk slowly enough and watch where you set foot. Better be careful. The hardest part has been the adaptation of these footings on fairly sturdy shoes and a thin leather ... It took many pull the straps so that they are longer and thus manage to wrap any winter shoes a little wide. Do not be discouraged if initially you feel that you bought the wrong product. Take care to learn and adjust to the shoe sole, rubber is of good quality and does not splinter. One can easily go down the stairs and walking on a ground without snow, provided of course always go pianissimo ...! Their price is interesting as their lightness.