This 4 bow 8' boat bimini top replacement cover is built from heavy-duty 600D marine-grade polyester for reliable Uv and weather protection on the water. Designed to fit most 4 bow frames with widths from 91 to 103 inches, it delivers dependable shade for pontoon boats, fishing boats, and deck boats. Includes breathable mesh side curtains for ventilation and bug defense, plus a storage bag for portability. Snap-button installation gets you set up fast so you can enjoy more time on the water.