Petmate 25871 Dogloo Xt W/Microban 50-90Lbs The classic igloo-shaped Dogwood XT protects your dog from outdoor elements The shape helps keep the house stable in high winds &amp; naturally sheds snow &amp; other debris that could collect on top Features a roof-top ventilation system to promote good air circulation Made with Microvan antimicrobial to fight the growth of stain &amp; odor-causing bacteria, mold &amp; mildew