Features: Cushion fit the foot arch, match with your feet arch, and gently relieve pain from flat feet; Massaging Cushion is comfort and support, relieves discomfort. Wearable insoles great for flats, pumps, high-heels, sneakers, ballet flats, boat shoes, loafers and more! Mesh sole reduces moisture and improves breathability to assist with perspiration and odor protection. Silicon gel tab at the Achilles tendon keeps your support socks snug in place and prevents the sock from slipping off within the shoes. Made of breathable material,elastic and abrasion-resistant. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Material:Nylon, spandex Size: 21-23cm