adidas Men's Baselayer Climalite UPF Long-Sleeve Crew Top 92% Polyester/8% Spandex Imported Ultratech Climate base layer is what you need if you're looking for an all-purpose, do-anything extra layer 40+ UPF protection against the sun's harmful rays Super soft, stretchy and quick-drying Tag less construction and Super smooth stitching deliver superior comfort Tapered athletic fit looks good and gives you freedom of movement