Fabric: Polyester Oxford Nylon Fabric, Mesh, and Pearl Cotton Foam. This ripstop fabric provides good flotation and allows for quick drying and proper drainage. Features: Adjustable Nylon Straps with quick-release buckles. A secure magic sticker fastening system around the belly and neck ensures a specific fit for your dog's chest, belly, and neck. Safety: A durable handle on the back makes it easy to lift your dog in an emergency. The front float assists in keeping your dog's head above water. Reflective stripes and bright colors enhance visibility. Application: This life jacket is suitable for swimming and can also function as a cold-weather coat due to its waterproof fabric. Girth is the most important measurement for determining the correct size. Use a tape measure to measure the widest part around your dog's ribcage. Use this measurement to select the correct size. If your dog's measurement is between sizes, choose the next size up. Size Guide: XS: Girth: 11.8-16.5in; 30-42cm; Weight: 4.4-8.8lbs. S: Girth: 16.1-20.86in; 41-53cm; Weight: 8.8-15.4lbs. M: Girth: 16.1-24.8in; 41-63cm; Weight: 15.4-22lbs. L: Girth: 19.7-29.5in; 50-75cm; Weight: 22-44lbs. XL: Girth: 27.5-38.5in; 70-98cm; Weight: 44-110lbs.