TOUGH COTTON FIREFLY - It's constructed with a TOUGH COTTON finished twill and stitched with heat-resistant Firefly thread from top to bottom KEY FEATURES - Firefly thread used throughout, 4 pockets, YKK Nomex zipper with locking slider at front fly, Metal Prym 5.11 logo snap with extra strong grip and 4 hole melamine buttons that won't melt, burn, or crack, attached by cross tacking QUALITY - 100% cotton, twill, 7.8-oz, Tough Cotton finish with Firefly thread used throughout SIZING - Regular fit and Unhemmed with Self-adjusting waistband with gripper tap. Waist 30-32, 32-34, 34-36, 36 to 38, 38 to 40 WHY 5.11: We are global innovators who make purpose-built technical apparel, footwear, and gear for life's most demanding missions.