REI Sahara White Long Sleeve Hiking Shirt. Collared neckline. Button up front. Roll up sleeves. Vented back yoke panel. Chest pockets. Lightweight. Body: 94.5% Nylon / 5.5% Spandex. Panels: 100% Polyester. Machine wash. 🔸Size: Medium 🔸Armpit to Armpit: 24 Inches 🔸Length: 28 Inches 🔸Condition: Excellent Used Condition All measurements are approximate and taken with the item lying flat. I do not trade or model. Thank you so much for your interest!