Feet are highly stressed every day by your body weight, so they deserve extra careand relaxation. Permanent magnetic spots help to regulate human bio-magnetic fields,balance circulation system and neural system so as to maintain and improvehealth (can be used with or without magnets). The gel and granules inside helpto cool down the feet temperature, thus reduce sweat, so much less chance for germsto grow, and feet smells better. One size fits all by easy cutting edge Sizes: a) Men's style: 39 - 45 b) Ladies' style: 36 - 39Gel color optional.9) Quality high frequency sealA refreshing walking on gel insolePacking: 1pr/OPP bag producing area:China payment:T/T, L/C