Two mesh windows and a 28.5" door height keep air moving through an interior that holds up to three children of 4.9 ft or under. A sponge-padded mat is built into the floor rather than sold separately, so there is nothing hard underfoot. Polyester cotton over the frame measures 49" x 39.5" x 50" with 29.5" side walls. Takes two AA batteries for the light, not included. For ages three to eight; net weight 8.5 lbs.