Abstract: A backpack strap system for carrying a load comprises: an elongated sheet of flexible material; vertical load straps each attached at the top and bottom edges of the sheet; and horizontal load straps each attached at the first and second side edges of the sheet. Sheet and load straps are adapted for wrapping around and securing loads of various sizes and/or shapes. The top edge of the sheet is adapted for carrying the load, usually on foot, by shoulder straps, carrying straps, and/or a hanging strap secured thereto. The load is laid on the sheet, and the sheet and load straps are wrapped around the load to secure it, enabling the load to be lifted/carried. Examples of oversized loads include animal carcasses, firewood, or an injured person. The sheet may be adapted to fold up and function as an ordinary backpack, and/or to carry auxiliary packs or storage containers.