Marmot Men's Size Chart When the fog rolls in along the Howe Sound, get out for a hike before the real rain hits. The Zephyr, with fabric engineered to be more breathable through AirExchange performance technology, is a lightweight button-up that's quick to wick and dry for uphill pushes, yet casual enough to roll straight from the Chief to the brewpub. This packable shirt is made with Bluesign-approved fabric. Features: - Bluesign Approved Fabric - AirExchange Performance Fabric - Cooling Technology - Packable, Air Permeable, Lightweight Fabric - Ultraviolet Protection Factor (UPF) 25 - Durable Flat Felled Seams - Shirt Tail Hem and Single Patch Pocket - Fit: Regular Fit - Main Materials: 100% Polyester Plain 2.5 oz/yd - Weight: 0lbs 6oz (170.1g) - Spring 2018 - Last Chance: Discontinued Style