When I first opened the box, I was really doubting this shelf unit would be strong enough to hold bolts of fabric in my shop. But as it was already here and unpacked, I put it together anyway. This piece shocked me. Once the shelves are in place it becomes super sturdy; lightweight, but impressively sturdy. I now own four of these and they are amazing for holding heavy fabric bolts, plus with the slim profile they take up little real estate. Highly recommend.