These are very sturdily built bags in a substantial fabric. We haven't actually placed our trees inside the bags yet, but we are looking forward to doing that after this coming Christmas season. It'll be nice not having to try to wedge the trees back into their original cardboard boxes which are always way too small for the trees! We are glad these Christmas tree storage bags come with wheels - our artificial Christmas trees are quite heavy and this will make it easier to move them into and out of storage.