Merrell Opti-Wick fabric transfers moisture away from your skin and dries quickly to keep you comfortable. 100% polyester. 50+ UPF fabric. Merrell N.A.D.A. dye-free colorway option. Textured fabric with reversed side panels. Two-tone zipper with lockdown pull tab. Raglan sleeves for enhanced range of motion. Engineered rib knit collar with interior mesh webbing to wick away moisture. Three-tone flatlock stitching reduces bulk and chafing. Merrell embroidered logo.