The Al Mar Knives Olive Drab Green T-Shirt is super comfortable and lightweight 60% combed Ring-Spun cotton, 40% Polyester. It features the Al Mar Knives logo with Chop on a grey and black repeating chop pattern background with a Combo Edge SERE Knife Silhouette on the chest and the red Al Mar Chop on back just at the neck on the OD Green shirt that matches our SERE line of knives in OD Green.