The Dog Helios Ice-Breaker Extendable Hooded Dog Coat is inner lined with Heat Reflection Technology, a specially developed Lightweight inner barrier that Reflects back Natural Body heat back into the body. The Ice-Breaker Dog Jacket also features a dual extendable hood design with dual jaw strings that extend and cover a larger portion of the facial area to prevent colder air from entering. The sleeves offer elastic stitching that conform to proper leg girths with a waist buckle that adjusts to various dog chest sizes to further seal out the outdoor frigid air temperatures while offering a more premium and comfortable fit. The Exterior shell is Waterproof Coated and Features Reflective Tubing and Printing throughout the body. Available in Multiple Sizes and Colors. General Sizing Guide: From Back of Neck to Tail area (“In” Inches) 8”: extra small. 10-12”: small. 14-16”: medium. 18-20”: large .22-24”: extra-large. Sizing Specifications: (In Inches). XS: 8.3” Length, 17.7” Chest Girth, 12.2” Neck Girth. SM: 11.8” Length, 21.7” Chest Girth, 13.7” Neck Girth. MD: 15” Length, 24.4” Chest Girth, 15.8” Neck Girth. LG: 18.9” Length, 29.9” Chest Girth, 16.9” Neck Girth. XL: 22.8” Length, 34.7” Chest Girth, 18.9” Neck Girth Features: Weather Resistant, Waterproof Coating Pet Intended For: Dog Base Material: 100% Polyester Care: Wipe Clean, Spot Clean Country of Origin: Imported