O'Brien BioLite Dog Life Vest w/ HandleMan's Best friend has enough to worry about - chasing their tail, toys to retrieve, lakes to swim in, and treats to devour. The Dog Life Vest by O'Brien provides your favorite pet with safety and protection when out on the water. This dog life vest is constructed with BioLite. BioLite technology unleashes the power of a lighter weight fabric that is an eco-friendly alternative to Neoprene. BioLite jackets are lighter weight, breathable, environmentally friendly and printed with soy-based inks.Features: Nylon handle on back; 1 Neck Buckle; 2 Adjustable Ladder Locks; Size Chart: SizeWeight GirthLength XS Up to 15 lbs. 13" - 20" 12" S 15 - 30 lbs. 18" - 25" 16" M 30 - 60 lbs. 24" - 30" 21"L 60 - 80 lbs. 29" - 36"25" XL Over 80 lbs. 30" - 42" 26"