Olive green, wool slacks, zipper fly, back pockets US Army M51 These are OD-colored field trousers adopted by the US Army in 1951, made from 18-ounce twill wool serge. Designed for cold weather use, these trousers were used in temperatures down to -10 degrees Celsius. For temperatures below -10 degrees, Arctic overpants with a liner were used. With a no-tuck design and a generous thigh, these trousers are full of the classic charm of the 1950s. Their simple, high-quality construction is sure to satisfy those who appreciate quality. The front features a zipper fly and double back pockets, characteristic of the early models. They also have easy-to-use side slash pockets and two button-closure flap back pockets. They have a chino-like shape with a straight, wide silhouette. Suspender buttons and loops are attached on the inside, allowing for suspender wear. The waist also has adjusters for waist size adjustment. You can also wear them with the "Genuine New Deadstock US Army M-50 Trousers Suspenders" that we also carry, by hooking them onto the loops. The easy-to-wear wool twill is spun from wool and has excellent heat retention, as well as antibacterial and deodorizing properties. These trousers are versatile and can be worn with a wide range of styles, from casual to traditional. I purchased these but have only tried them on. - Color: Olive Green - Design: Zipper Fly - Pockets: With back pockets Thank you for looking.