Sturdy Structure: Enhanced the front and sides with PVC tubes and honeycomb boards. Your pet can see out the window in car rides crawling on any sides without worrying of seat deformation or collapse. Safety Design: Enjoy driving with enhanced safety design. Firstly, the Safety Strap is shortened and has premium metal clip, pet shall no longer jump out and get choked, and metal clip won't break easily as plastic ones. Secondly, it can be installed tightly both on car front seat by Back Strap, and on back seat by the back Safety Belt Loops. Large and Waterproof: Ideal size @ 17'(L)*14'(W)*10(H), plenty of room for small and medium pets up to 20lb.