USGI M51 Wool Shirt - Grade 2As Grade 2 items, these may have repairs, missing buttons, small holes, stains or other small damages. Still plenty of warmth in these wool shirts though! Our shirt dates vary, with later models having hook & loop patches above the right hand pocket. These shirts were made for cold combat situations and use around the base. The perfect piece of clothing for anyone seeking something comfortable and hard wearing for cold outdoor activities such as