Product details:

Features of the ExOfficio Men's BugsAway Gallatin Long Sleeve Shirt Bluesign approved fabric Ultraviolet protection factor (UPF) 50 Lightweight, quick-drying, wicking, abrasion resistant Nylon/Polyester blend Vented back yoke with mesh lining for breathability Mesh lined front yoke with velcro closure and left chest zipper secure pocket 3-Position button-down sun collar Durable flat-felled seams Forward set shoulder seams Sunglass cleaner chamois patch inside the bottom left placket Roll-up sleeve tabs Straight hem Fabric Details 100% Nylon