Mares Excel Plus Open Heel Scuba Diving Fins FEATURES New foot pocket. More comfort, same great performance Elastic OPB. Maximum efficiency, minimum effort Tri-material technology and ABS Plus buckles Sizes: XS, Small, Regular, XL COLORS: Pink (XS and Small Only) Red Yellow Blue Silver (except XS) Heir to the Quattro Excel, the Excel + rediscovers the roots of its noble ancestor, the Avanti Quattro. Thus, a new fin is born, and thanks to its fully redesigned foot pocket, it offers both propulsive force and unbeatable comfort. The back of the foot pocket is made of soft rubber, further increasing comfort and performance.