Boat shoes (also known as deck shoes) are typically canvas or leather with non-marking rubber soles designed for use on a boat. A siping pattern is cut into the soles to provide grip on a wet deck; the leather construction, along with application of oil, is designed to repel water; and the stitching is highly durable. Boat shoes are traditionally worn without socks.
Modern boat shoes were invented in 1935 by Paul A. Sperry of New Haven, Connecticut after noticing his dog's ability to run easily over ice without slipping. Using a knife, he cut siping into his shoes' soles, inspiring a shoe perfect for boating and a company called Sperry Top-Sider. Sperry Top-Siders are still a popular brand of boat shoe today, among many others, including Sebago and Timberland.
Boat shoes are used by sailors, as the name suggests; however, since the 1980s they have become casual footwear in coastal areas of United States, Argentina, China, France, Portugal, Spain, Italy and the UK. Some boat shoes today have traditional white, non-marking soles, though many others today have dark non-marking soles. They usually have a moc-toe (like a moccasin) construction.