Usage: use together with a moisturizer to create better effect. Wear 60 minutes one time and wear at least 3 times each week. Daily use recommended. Breathable: designed with small holes to allow ventilation to reduce uncomfort. You will feel comfortable when wearing with socks, shoes, sneakers, boots. One size fits most: very stretchy and not easy to deform, can fit for most heel. Function: silicone heel gel sleeves can reduce pains of plantar fasciitis, achilles tendonitis tendon, heel spurs, sore heel, and also can repair dry and cracked heels. Great for running, walking, standing. Silicone gel material: made of soft and durable medical-grade silicone gel which is non-toxic, odorless and free of latex! Totally environmental-friendly and healthy material!.