Small animals like hamster which hair is very thick and sweat gland is not well-developed, need to pay high attention when the day is too hot. Hamster cooling house with the cooling pack is not only as a shelter but also like an “air-conditioner” room for them to cool down the temperature, feel comfortable and live happily. Please freeze the cooling pack for 12 hours before use. The cooling effect could last long 3 – 4 hours, depend on the inside and outside of the hamster shelter temperature. Once the cooling pack become soft, you can freeze and reuse it for many times. Porous breathable, comfortable and refreshing cool.