Material - Oxford fabric + EVA wheels;Dimension - 31' x 20.5' x 41.3' Double steel frame. It's durable and it's sturdy enough to hold two pets. It can be folded so that it's easy to storage and transport. Two spaces for two pets to have their own space. And each compartment size is 21.7' x 13.4' x 11.4'. Sturdy 4-wheel system for smooth rolling. 360 degree swivel front wheels and rear wheels can be locked for stability. MESH WINDOWS provide plenty of visibility and ventilation for the pet riding in it.