The Pulse is a great basic open heel fin, which is affordable. The comfortable sculptured foot pocket is equipped with squeeze-style" quick-release adjustable buckles and strap assembly that give it features of a more expensive fin. The Pulse has a rubberized bottom sole which gives them great traction when warn on a wet boat or pool deck. The durable rubber heel straps have a large pull tabs, and along with the quick-release buckles make it easy to don and doff. The Pulse non-vented plastic blade fins are available in multiple sizes, measure (L x W) 24.75" x 8.5" (62.9 cm x 21.6 cm) in size large, and come in multiple colors Oh yea, and the name tells you. You get outstanding propulsion in a Pulse.