Profile: Riverside Cartop Carriers, Inc. manufactures various products such as ski and snowboard kits, kayak kits, canoe kits, replacement block packs, twin strap packs, blocks, straps & paddle sport accessories. We also distribute large & small back bands, universal sit-on-top seats, brass swivel hooks, tri-fold seat cushions and kayak hangers. Our tri-fold seat cushion is used as a lumbar support and as an insulating pad for winter activities.