Replaceable self-adjusting marine grade bungee heel straps for GO travel fins allow for a versatile fit. Makes travel fins easy to don and doff. Constructed of quality marine-grade bungee for years of reliable use. Available in two sizes – Mini and Midi (Mini is for fins sizes 3XS and 2XS; Midi is for fin sizes XS-XL). Driven to constantly innovate and improve the diving experience, SCUBAPRO builds equipment for the work, sport, and lifestyle of people whose passion is found below the surface.