DescriptionMade of durable magnet and supple gel material, it has strong self-adhesive backing, so they will stay in place while allowing for repositioning if necessary. Perfect for bow-leg/knock-knee leg correction, pronation and supination applications.Features-Material: Gel, magnet -Size S: About 8.80X4.20X1.00cm/ 3.46X1.65X0.39inch -Size L: About 10.20X5.90X1.00cm/ 4.01X2.32X0.39inch - Made of supple gel and durable magnets material, can comfortably support the foot. It can be used with other insoles or directly in the shoe- We provide the size of insoles suitable for men and women.- The insole has a self-adhesive back, so they will remain in place and allow for repositioning if necessary.- Correction of high and low differences. Support either side of the foot to balance the foot's force.- Correct heel deviation, improve posture, and prevent ankle, knee, back and lower back pain.