A great vacation shoe can be found in the Seneca Thong Sandal by Cudas. It features a waterproof padded boat shoe styled upper, a contoured heel cup and arch support. This sandal has patent pending PerfectPull technology with a closure system built into the upper for a customized fit. There's a thin lace toe piece and a non-marking sole provides traction. This is the perfect footwear for a day of outdoor activities. Contoured Heel Cup PerfectPull Technology. Size: 9 M. Color: Natural/Tan/Jersey/Waterproof Nubuck. Gender: Female. Age Group: Adult.