Marmot Men's Size Chart The Syrocco Short-Sleeve Shirt is made for the modern hiker who takes a fresh, unconventional approach to life, style, and the trails. This semifitted shirt features unique AirExchange fabric construction and technology that provide advanced air permeability and enhanced drying time, so you stay cool from the trailhead to the brewery. UPF-25 protection and quick-drying, moisture-wicking fabric will keep you comfortable even when the sun comes out and the weather heats up. Features: - AirExchange Performance Fabric for Air Permeability - Packable, Breathable, and Lightweight - Ultraviolet Protection Factor (UPF) 25 - Polyester for Quick-Drying and Wicking - Durable Flat-Felled Seams - Shirt Tail Hem and Single Patch Pocket - Fit: Regular Fit - Main materials: 100% Polyester AirExchange Plain Weave 2.5 oz/yd - Weight: 0lbs 4.6oz (130.4g)