The Dog Helios Rufflex Mediumweight 4-way-Stretch Breathable Full Bodied Performance Dog Warmup Track suit was developed with premium Comfort and Flexibility in mind. The entire body features a specially configured Medium-weight elastic material that both cools and warms the body for year-round for year-round temperature maintenance. This specially blended fabric features high-level properties of Flexibility for unrestricted Mobility and is also extremely Breathable and Permeable. The Exo-shell features 4-way stretch construction that moves in every direction. The Rufflex tracksuit also features banded elasticity around the sleeves and across the body for a nice almost tapered relaxed fit with added room for growth. Features Dual-Reinforced stitching at every seam for Durability with added reflective taping for night protection. Additionally, this tracksuit features Quick-Drying technology that dries rapidly while offering Anti-Odor technology that prevents odor causing microbes. Assists with UV Protection against the suns harmful rays and fitted perfectly to help assist in containment or collection of shredded hairs. Features a fashion collar with a leash-slit along the back. Machine Washable. Available in Multiple Colors and Sizes. Sizing specifications: In (Inches) “Back” Length is from Neck to Tail: See image chart for sizing approximation- Extra small: Back: 9.8” Chest: 15.4” Neck: 11.4” Sleeve: 2.8”. Small: Back: 11.8” Chest: 18.1” Neck: 12.6” Sleeve: 3.1”. Medium: Back: 13.8” Chest: 20.1” Neck: 14.2” Sleeve: 3.5”. Large: Back: 15.7” Chest: 21.3” Neck: 16.5” Sleeve: 3.9”. Extra-large: Back: 17.7” Chest: 23.2” Neck: 17.7” Sleeve: 4.3” Pet Intended For: Dog Base Material: 50% Polyester, 40% Nylon, 10% Spandex Care: Machine Wash, Tumble Dry Country of Origin: Imported