Non-chafing flat seam construction Quick-drying, odor-control fabric UPF rating of 50+ blocks 98% of harmful UVA/UVB rays Side panels and comfort armhole design Peached finish Heat Holders Men's ULTRA LITE Long Sleeve T-Shirt is a supremely comfortable and practical tee, designed and built for all-day wear. Fabric 50+ UPF rated: blocks 98% of the sun's UVA/UVB rays.