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