Many people find wearing fins quite irritating so they use finsocks. This can make your session a much more pleasurable with the aid of finsocks. Some are made from lycra which can stop you getting ulcers or a rash. Others are made out of neoprene [wetsuit material] and is thicker that lycra, therefore giving you more protection. Take care of them by washing them out after every surf and don't squash them up in the bottom of your boardbag and leave it.