Kaytee Igloos are constructed from durable plastic, making them easy to clean, plus they're odor and stain resistant! Igloos one piece design is easy to use and every Igloo has fresh air vents to ensure your pet's health and well-being. Igloos make a "Cool" hideout for dwarf hamsters, mice, and other furry friends. Assorted colors. Size: 4.5"L x 4"W x 3"H.