royalwise Light up Dog Christmas Shirt Costume Xmas Tree Pet LED Clothes Large Dog Hoodie Holiday Pet Sweater for Medium to Large Dogs Multicolor led Bulbs, multiple flash and fade modes Soft and stretchy polyester, durable,light weight & super comfy Christmas themed led light up dog dress, keep dog warm and attractive Easy control battery-LED lights are controlled by a switch inside the hoodie This dog sweatshirt RUNS SMALL, if your dogs are between sizes or broad-chested, consider sizing up