The Pet Life LED Lighting Santa's Magical Hat Sweater Pet Costume features a small and lightweight inner stitched compartment pouch containing an LED On and Off switch which controls the lights on the back side. This fun Holiday costume will help your pet stand out in style and is especially fun to wear in the dark. The outer shell is composed of a comfortable Polyester and Cotton blend, and it also features belly Velcro enclosures for convenient on and off access, as well as a Leash slit holder at the back side. Available in Multiple Sizes. Features: LED Battery Operated Lights continuously flash Ultra-plush cotton exterior On-Off accessible button Available in multiple sizes and styles Batteries included Includes: 1 Pet Life LED Lighting Magical Hat Hooded Sweater Pet Costume Intended For: Dog, Cat Color: Black Material: Polyester, Cotton Care Instructions: Remove battery back. Machine wash cold. Hang to dry. Available Sizes: X-Small: Back: 9 in; Chest: 16 in; Neck: 12 inSmall: Back: 11.5 in; Chest: 17 in; Neck: 15 inMedium: Back: 14 in; Chest: 21 in; Neck: 15 inLarge: Back: 18 in; Chest: 26 in; Neck: 18 in Pet Life Halloween LED Lighting Magical Hat Hooded Dog and Cat Sweatshirt, Size: Medium | Polyester PetSmart