Proven to deliver UPF 50 protection even when the fabric is stretched by 30 percent, the lightweight material used for these slip-on knee covers will keep you covered and cool so you can lay down the hammer at the height of summer. - In-R-Cool technology to provide optimal skin-cooling effect and moisture management when you perspire - ELITE Transfer fabric with UPF 50+ sun protection and Ice-fil - BioViz reflective elements for low-light visibility - Easy slip-on fit - 93% polyester 7% elastane - Technology: Ice-fil