FABRIC: High grade Polyester Oxford Nylon Fabric, Mesh and Pearl Cotton Foam. keep good floation and proper draining and drying which is not only ripstop but also allow for quick drying and proper drainage. FEATURES: Adjustable nylon straps, quick release buckles, heavy duty yet more comfortable magic sticker fastening system around the belly and neck to keep securely fastened, assure size fit specifically for dog's chest, belly and neck. SAFETY: Durable handle one the back will make it easy to pull your dog out of any emergency.The front float assists in keeping dog's head above water. Reflective stripes and bright colors to enhance maximum visibility. APPLICATION: This life jacket is not only for swimming. You can also make it camo hunter vest, keeps dogs warm on cold swims. It is also a perfect cold weather coat in winter for your dogs according to the waterproof fabric. Girth is the most important measurement for determining the correct size gear for your dog.Use a tape measure to measure the widest part around your pup's ribcage. Use this measurement to estimate the correct size for your dog .Remember,girth is most important you should choose the next size up if in between sizes. XS: Girth: 11.8-16.5in; 30-42cm; 4.4-8.8lbs S: Girth:16.1-20.86in; 41-53cm; 8.8-15.4lbs M: Girth:16.1-24.8in; 41-63cm; 15.4-22lbs L: Girth:19.7-29.5in; 50-75cm; 22-44lbs XL: Girth:27.5 38.5in; 70-98cm; 44-110lbs