It's the easy, effective way to make your existing footwear even warmer and more comfortable. Ideal for use in winter months or in cold store/freezer environments, FB41 thermal insoles are backed with aluminium foil which reflects cold air away from the feet. Each insole can be cut to the desired size quickly and easily, while a layer of felt provides and extra dimension of comfort. Ensure your feet are as warm as possible with FB41 thermal insoles from FlexiTog.