Specification : - UNIVERSAL- Stretchable material fit bicep size up to 15" - SUN PROTECTIVE: 50+UPF, provides UVA UVB protection, blocks 99.8% UVA/ UVB - BETTER MATERIAL THAN OTHER BRAND - Make of cooling protofilament (92% polyamide, 8% spandex). - HIGH PERFORMANCE FABRIC Lightweight breathable fabric - ULTIMATE COMFORT: Seamless weaving design provides a streamlined fit