Marmot Men's Size Chart The Men's Jasper Midweight Long-Sleeve Flannel Shirt features moisture-wicking and quick-drying COOLMAX(R) 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(R) Product, this shirt reduces environmental impact, meeting Bluesign(R) environmental standards. Features: - Semi-Fitted - Durable, Midweight Performance Double Brushed Flannel - COOLMAX(R) EcoMade for Moisture Management - Marmot Upcycle(R) 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 - Bluesign(R) Approved Fabric - 57% Cotton 43% Recycled Polyester Twill Flannel 4.3 oz/yd