Canoe Seat with Back: Made using only the highest quality materials, this field-tested folding canoe chair with back support is exceptionally easy to open, close, and carry Comfortable & Supportive: The ultimate canoe accessories, these collapsible boat seats feature a supportive lumbar cushion and BackComfort technology for customized reclining Collapsible Design: A portage lock and a shoulder strap with Auto-Fold Technology allows for easy opening, closing,and carrying; Split-contour folding canoe seat with back includes lumbar pad and built-in storage pocket Simple Setup: Easily attach this SitBacker adjustable canoe seat to any canoe seat or bench using the dual-buckle bench attachment Compact: Supports 250 lbs; Measures 12.3 x 16.5 x 17.9 inches open and folds to 3.7 x 16.5 x 16.5 inches; 2.9 pounds; 17 inch seat strap length Patented BackComfort Technology for customized reclining Patented single buckle Auto-Fold Technology with Portage Lock shoulder strap for easy folding and carrying Dual buckle bench attachment and storage pocket Supports 250 lbs yet weighs only 3 lbs Measures 11” x 16.5” x 18” when open and folds to 16.5” x 16.5” x 5.5”