This hot/cold cat mat is a clever 2-in-1 solution for year-round comfort: the light blue surface keeps pets cool in hot weather, while the gray side features ultra-soft fluffy fabric for warmth and protection in cold winters. It boasts a self-warming and temperature-lock design-no plug or electricity needed! Remove gel packs and replace them with clothing, towels, or heating pads for a softer, warmer alternative self-heating technology absorbs, holds, and reflects your pet s body heat for natural warmth, while the temperature-lock design keeps them toasty on cold days. Enhanced with a lightweight, breathable nylon top layer for cooling, tuck the included gel packs into built-in pockets (simply soak, freeze, and insert-no electricity required). Available sizes: Medium, Small. Available colors: Light Blue+Gel ice pack, Light Blue+Gel ice pack+Selfheating pad