New and Improved with higher, sturdier walls and easier removal of inner pack, this bed provides relaxing warmth and/or refreshing cool. Your pet will snuggle in this bed on those cold winter nights or enjoy a refreshing cool bed in the summer. The inner pack is microwaveable for a heat pack or can be placed in the freezer for a cold pack. This bed can be used as a regular plush bed anytime. Filled with 100% natural ingredients. Machine washable bed. 18" diameter.