For scuba diving the sole of the bootee should not be so thick that the diver cannot get a fin on over it. Divers wearing bootees use fins with a foot part larger than needed with bare feet. Divers in warm water who do not wear a diving suit sometimes wear bootees so they can wear bigger fins. Diving bootees are typically intended for wear with open-heeled fins, held on by a strap, and usually do not fit into full-footed fins. Neoprene socks may be used with full-footed fins, either to prevent chafing and blisters, or for warmth.