Our therapeutic massaging insoles have a revolutionary design that allows your foot to float on of the liquid glycerin as you walk giving you a constant foot massage. Because liquid is self leveling, your entire body weight will be distributed evenly across the entire surface of your foot relieving on your back and knees. Feature - Color: Black. - Materials: Velvet, TPU and Glycerin. - Size XXL: 31.3 x 0.6cm. - Size XL: 29.5 x 10.3 x 0.6cm. - Size : 28.3 x 10 x 0.6cm. - Size L1: 27.3 x 10.3 x 0.6cm. - Size M2: 27.0 x 9.2 x 0.6cm. - Size : 25.5 x 9.2 x 0.6cm. - Size S: 24.3 .8 x 0.6cm. - Size XS: 23.3 x 0.6cm. - Made of material for comfortable wearing. - Cleverly designed that will allow your foot to float on of the liquid Glycerin. Feel the instant and say goodbye to foot and knee pains . - The massaging insoles are for back treatment and they will help you the effects of Fibromyalgia, Heel Spurs and Plantar . - Our liquid filled foot insoles have a thin and flexible design. You won’t feel while wearing them, just a feeling of elevation and . - They will depress and give arch thus increase the circulation levels of your whole body. Package list: 1 pair x insole