All Massif Products Are GSA Approved, US Mil-Spec, 100% NEW, First Quality, NO Irregulars Or Seconds, Berry Compliant, & 100% MADE IN USA! Worn by thousands of USAF aviators, this design prioritizes fit and lightweight functionality for gear that performs when you do. These garments feature Massif'sA(R) proprietary flame-resistant technology and won't support combustion in flash fire scenarios. Engineered with Massif's proprietary knitting and finishing technology, our fabric provides proven durable performance and comfort from the inside out. Features Full flame-resistant construction with proprietary 4-way stretch MassifA(R) fabrics Zippered hand-warmer pockets for comfort Lower-leg cargo pockets for storage Zippered back pocket for security Knee-length inseam zips for easy donning and doffing over boots Built-in web belt with elastic waist Tiger Pattern Men's Sizing Information Inches Size Chart XSSMLXLXXLXXXL NECK 13-13.5 14-14.5 15-15.5 16-16.5 17-17.5 18-18.5 19-19.5 CHEST 30-33 34-37 38-41 42-45 46-49 50-53 54-57 CENTERBACK ARM Short 29.5-30.5 30.5-31.5 31.5-32 32-33 33-33.5 33.5-34.5 34.5-35 CENTERBACK ARM Regular 31-32 32-33 33-33.5 33.5-34.5 34.5-35 35-36 36-36.5 CENTERBACK ARM Long 32.5-33.5 33.5-34.5 34.5-35 35-36 36-36.5 36.5-37.5 37.5-38 WAIST 25-27 28-31 32-35 36-39 40-44 45-49 50-56 INSEAM Short 30 30 30 30 30 30 30 INSEAM Regular 32 32 32 32 32 32 32 INSEAM Long 34 34 34 34 34 34 34