Uses / Indications: Tynor K-12 Insole Gel Massage is a free flowing gel cushion, massages and absorbs pressure with every step. Fluid forms to the exact shape of the foot, equalizing pressure under the foot. Made from high-quality durable urethane and are filled with a non-toxic glycerin gel. Odor-resistant, urethane covering reduces perspiration and retards bacterial growth. It is a washable trim-to-fit and transfers from shoe to shoe.Available sizes:S (34-36) EuropeanM (37-39) EuropeanL (40-42) EuropeanXL (43-45) EuropeanSalient features of Tynor K-12 Insole Gel Massage:Extra soft spot.Focused pain relief.Relieves pressure at the base of the calcaneus.Can easily be put into shoes.Convenient and comfortable.Long functional life.Odourless.Easy to clean and maintain.