Dog Helios Outdoor Series jacket in blue and gray. Dog Helios Arctic Blast Full Bodied Winter Dog Coat w/ Blackshark Tech - Blue. Brand: Helios Features: Waterproof, windproof, snowproof, breathable, and tear-resistant with a warm polar fleece inner lining. Visibility: Features reflective tubing and printing for enhanced visibility during the night. Fit: Includes a removable and adjustable hood with jawstrings, and elastic banding for a tailored fit general sizing guide: Extra Large- from back of neck to tail area (in inches): and 22.8 in. Length, 34.7 in. Chest Girth, 18.9 in. Neck Girth