Shoulder strap, which is padded. The strap is like 4" wide or so, and can hold a ton of weight. I have had 3 tanks, 3 hoppers, two full marker cases (not soft cases, 2(x) 2 pistol hard cases with double layer foam), 2 more guns, and 2 harnesses in it at once. The strap held to carry it no problem. And yes, it was heavy.