The Pet Life LED Lighting Patterned Holiday Hooded Sweater Pet Costume features a small and lightweight inner stitched compartment pouch containing an LED on and off switch that controls the lights on the backside. This fun holiday costume will help your pet stand out in style, fun to wear in the dark. Outershell is composed of a comfortable polyester and cotton blend. Features belly hook and loop enclosures for convenient on and off access. Features a leash slit holder at the back side. Sizing Guide: (From back of neck to tail area) Extra Small: 8"  Small: 10-12" Medium: 14-16" Large: 18-20" Features: Light-Up Pet Intended For: Dog Base Material: 80% Polyester, 20% Cotton Care: Machine Wash, Tumble Dry Country of Origin: Imported