Description ***GOHUNT Staff recommends ordering this vest true to size when worn as a mid-layer over a lightweight base layer and underneath a puffy jacket or rain gear*** The GOHUNT Atmosphere Vest was made to move, delivering breathable warmth without restricting your range of motion. Lined with 100g PrimaLoftA(R) Evolve insulation, it helps retain warmth while allowing excess heat to escape during your most active hunts. A durable 20D micro ripstop nylon face adds stretch and abrasion resistance, while the DWR finish helps shed light precipitation. A full-length YKK zipper and zippered hand pockets make it easy to regulate temperature and keep essentials secure in cool to cold conditions. Sizing MEN&';S SIZING GUIDE SIZE CHEST X-Small 33 - 35" Small 36 - 38" Medium 39 - 41" Large 42 - 45" X-Large 46 - 49" XX-Large 50 - 53" XXX-Large 54 - 57" How to Measure: Chest Measurement Take the measurement under the armpits, and around the fullest part of the chest and shoulder blades. Specs Weight 8 oz (Large) Material 20D Ripstop nylon face fabric (eco-friendly DWR) Insulation 100g Primaloft Evolve active insulation is soft, warm, and breathable PFAS Compliance Compliant with AB-1817 Manufacturer Warranty Lifetime coverage for defects in workmanship or materials