Features： 1、Built In 3 Magnets: This arch support sleeve has three built in magnets that fit and massage the center of the foot to relieve foot fatigue. 2、Multi Function: This arch support sleeve is multifunctional and can support the arch, equalize the force, shock absorption and pressure relief. 3、Easy To Use: This arch support sleeve is very easy to use, you just put this arch support sleeve onto your foot and align the magnet to the center of your foot before exercising or walking. 4、Wide Application: This arch support sleeve is very versatile and it can be used while standing, walking and running. 5、Thin Strap Design: This arch support sleeve is designed with thin strap, which is elastic and easy to put on and take off. Specification： Item Type: Compression Arch Support Sleeves Material: Polyester, Magnet Size: 11 x 8cm/4.3 x 3.1in (Manual measurement has some error) Package List： 2 x Compression Arch Support Sleeve