The Men's Jasper Midweight Long-Sleeve Flannel Shirt features moisture-wicking and quick-drying COOLMAX?? EcoMade technology, so you stay dry, warm, and comfortable. UPF 50-rated fabric blocks the sun's harmful ultraviolet rays. Made from recycled Marmot Upcycle?? Product, this shirt reduces environmental impact, meeting Bluesign?? environmental standards.. . 57% Cotton/43% Recycled Polyester Twill Flannel 4.3 oz./yd.. Bluesign-Approved Fabric. Durable, Midweight Performance Double Brushed Flannel. COOLMAX?? EcoMade for Moisture Management. Marmot Upcycle?? Product with Recycled Polyester from Post-Consumer Plastic Bottles. Ultraviolet Protection Factor (UPF) 50. Quick-Drying and Wicking. Double Brushed for Added Comfort. Durable Flat-Felled Seams. Contrast Chambray Inside Yoke, Collar Stand, and Placket. Double Chest Pockets with Button Closure. Shirt Tail Hem. Fit: Semi-Fitted. Weight: 9.92 oz. (281.2g). Machine washable. Imported.