The grass was almost 30" tall. It was necessary to install a couple lengths to each leg.
Alas, last year, while dragging a buck down a steep hill, the buck caught up with me and hit me behind the knee like we used to do to a friend in school. In school we didn't keep pushing on the back of the knee or were not on a steep hill. The deer kept pushing. Anyway, I fell backwards on the backpack. I laid there for a couple minutes, contemplating my age at 78 and wondering how badly I was hurt, since I really hurt. Then I realized the pain was worse in the center of my back, but the rest of me was sorta OK.
I discovered the pain in my back was caused by a rock about 6" diameter and protruding from the ground about 3" - 4". I checked the contents of the backpack. The B-Squar was broken and two rolls of toilet paper were flattened. Thank the Lord for the cushion.
The rifle stock didn't fair as well. Right on the "cheek weld" must have hit a rock also, but t didn't have two rolls of toilet paper to cushion it. The fiberglass or carbon fiber got smashed in 1/16" - 1/8". None the worse for ware, though, it doesn't scrape or pinch my face.