Feetures! created the Plantar Facsiitis Sleeve to help reduce heel pain and swelling linked to plantar fasciitis. Easy to slip on and easy to slip off, this graduated compression foot sleeve can be worn when you"re running during the day or when you"re sleeping at night. This is an effective and convenient way to relieve the discomfort of a common pain that plagues runners and hikers alike. Product FeaturesMaterial: 76% iWick nylon, 24% LycraUPF Rating: Antimicrobial: Compression: mediumRecommended Use: running, hiking, supportManufacturer Warranty: lifetime