This bsa430 inflatable boat is made of 2000 denier 1.2 mm PVC fabric with an aluminum floor board and marine plywood transom. It is a much more heavy-duty PVC fabric than 1100 denier 0.9mm PVC boats. We also have added double layers of fabric at the bottom of the tubes. This allows 2.4 mm of lower tube protection from sharp rocks and abrasive sands. This model is a heavy-duty, foldable, inflatable workboat, great for water rescue, fishing, day trips, or scuba diving. Features: Main Tube Fabric: 2000 denier 1.2 mm PVC bottom floor fabric: 2000 denier 1.2 mm PVC floor type: 12.5 mm thickness aluminum floor marine plywood transom for outboard motor double layers of fabric at the bottom of the tubes five individual chambers one-way drain valve with plug aluminum side joiners with rubber ends deep v-keel with rub-strake protection stainless steel d-rings for easy towing built-in oarlock for easy rowing oar holder.