Tree protectors are an essential accessory that should always be used in conjunction with slacklines, ninja lines, zip lines, tree swings and other outdoor gear products. NOT recommended for use with Hammocks. Protect your gear and your trees with ZenMonkey Tree Protectors. Designed with extra length to wrap around larger trees, these bark protectors feature guide loops** to hold your slackline in place during set up. Built-in hook-and-loop fasteners firmly secure the tree protection in place during use. **Guide loops are not designed to be weight bearing, but rather to hold webbing or rope in position while your slackline, ninja line, zip line, or tree swing is being set up.