Arm Sleeves UPF 50+These arm sleeves are ideal when wearing a short sleeve t shirt or polo, protecting your arms and hands from UV rays. Designed for individuals with sensitive skin, and sold as a pair, they come in two styles: with or without thumbholes. A thumbhole is a sleeve opening for the thumbs. Available in two styles: With thumbholes: designed with a thumbhole, this style allows slipping your thumb through the sleeve, offering added protection for the back of