Our "Nautical" design makes our newest Paws Aboard Designer Doggy Life Jacket a perfectly safe outfit for hanging out on the deck or the dock. Paws Aboard Life Jackets provide ultimate buoyancy and high visibility to keep pets safe on the water. These dog lifejackets are constructed of durable non-chafing materials to provide the highest levels of buoyancy and all-day comfort. XXS: up to 6 lbs. XS: 7-15 lbs. S: 15- 20 lbs. M: 20- 50 lbs.