87-99 YAMAHA BIGBEAR350: Quad Works Gripper Seat Cover (Black) Quad Works replacement seat covers for sport and utility models. The Quad Works Seat Covers are made from the finest UV-resistant heavy-duty marine-grade vinyl available and are double-stitched for durability. The Quad Works Gripper Seat Cover provides not only durability but top-of-the-line seat traction...great for racing and wet and muddy conditions.Gripper finish.Heavy-duty UV-resistant marine-grade vinyl.Double-stitched for durability.Available for utility