The Dog Helios ® Weather-King Ultimate Windproof Full Body Winter Dog Jacket is Inner-lined with exclusively developed Blackshark Heat-Retention Technology that maintains and reflects your pet's body heat back into the body. This innovative fabric is Lightweight, Waterproof, Impermeable, Windproof, Snow proof, Breathable, and Tear-Resistant while Retaining any lost body heat during those frigid weather conditions. Additionally the windproof dog jacket features a Waterproof treated Lightweight Polyester blended Outer-shell with added proprietary coatings that that make it completely waterproof. The Outer fabric also features surrounded reflective 3M tubing, taping and reflective-embedded fabrics for complete safety during night strolls or during any extreme activities and features Velcro adjustable sleeves to further prevent any colder air from seeping through the sleeve areas. These Weather-King Dog Jackets further feature an additional adjuster by the Neck area and the Hood completely opens closer to the facial area to protect the face from any type of frostbite as one of the most important coverage areas which is also adjustable. Features connector Belly and Chest Velcro closures for added warmth and support for a more customized fit. Features Leash Slit holder at the back-side with accented Embroidery and Print on the Outer-shell. Get Outdoors with Dog Helios! This dog windbreaker jacket is available in multiple colors and sizes. 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