The new "Gull Wing" saddle will outperform all others and fit 95% of all hull shapes. Made of tough ABS plastic. Standard version fits Yakima and Thule racks, Universal Model fits factory installed racks. The huge 19" x 12" carpeted surface will act as "rollers" to load and unload your boat. Compare this 228 square inch surface against competitors rollers and saddles of 8 to 48 square inches. Standard "V" shaped "Gull Wing" kayak saddle fits most TOURING KAYAKS or where crossbars are placed further apart. Shallow "V" shaped "Gull Wing XL" kayak saddle fits most RECREATIONAL KAYAKS with Flat Bottoms or where crossbars are placed close together.