adidas Men's Baselayer Climacool UPF Long-Sleeve Crew Top 92% Polyester/8% Spandex Imported Ultratech climacool base layer delivers breathability in ridiculous amounts with its all over micro mesh fabric 25+ UPF protection against the sun's harmful rays Moisture management to keep you dry Tag less construction and Super smooth stitching deliver superior comfort Tapered athletic fit looks good and gives you freedom of movement