At Z1R, they are dedicated to making your ride a great one. Offering a full line of performance helmets, seats and apparel for the street, dirt, and snow enthusiast, they are uniquely positioned to provide quality products with real value, great styling, and the best possible materials and workmanship. EZ Glide II™ backrest. Automotive-grade vinyl covering. Detailed Specifications: Dimensions: 10"W x 7-1/2"H.