The roof can keep dogs protected from rain, wind, sleet and snow-The higher floor can stop rain flowing into the house-Keeps dogs cool in the summer and warm in the winter-Roof comes off for easy cleaning-Lightweight enough to be moved around-Assembles easily with just a screwdriver in a few minutes-Give your dog a comfortable, personal space-S: Suitable for small sized dog-M: Suitable for medium sized dog Installation guide