I used this for one season after purchasing it! My cat didn't chew on it, so it hasn't torn. There are some minor scratches on the power supply, but I think it works fine. The cover is dark gray. [The following is an excerpt from the product description] The heater body uses semi-permanent waterproof leather, which has an excellent effect of preventing water from entering the internal heating element. The heating element adopts a double spiral type, which can heat quickly and evenly. [7-level temperature adjustment & timer setting] The pet heater has 7 levels of temperature adjustment in the range of 32-50℃. Each time you press the adjustment button, the temperature display increases or decreases by 3℃. In addition, it is equipped with a 12-stage timer function, and the remaining time is clear at a glance on the digital display panel! [Anti-bite cable & removable cover] The power cord has a double structure, with ABS material on the outside and a metal spiral tube for electric shock prevention on the inside, preventing pets from biting and causing disconnection or electric shock. In addition, the outer cover of the pet heater is removable and washable, so it can be washed as a whole. [Overheating prevention] The latest heater mat has a built-in overheating protection device, and automatically turns off the power if the heater body rises to the set temperature/overheats/voltage abnormality, and automatically heats again when the temperature is lower than the set temperature. It can use electricity efficiently without waste, and is energy-saving and environmentally friendly.