Patent attributes
A flipper includes a skeleton structure having a rear base portion, two longitudinally extended side rails, and a plurality of spaced supporting strips extended in a longitudinal direction; and a web structure having a foot pocket associated with the rear base portion, two sheathings forward extended from two lateral outer sides of the foot pocket for wrapping the side rails therein, and a plurality of longitudinally extended webs provided between the two sheathings to locate between and connect two adjacent supporting strips as well as the side rails and the supporting strips. The flipper has a side rail structure with good elasticity and toughness to provide good water kicking and propelling force. A longitudinally extended slit may be provided on at least one of the webs and have a zipper provided thereat to freely adjust the length of the slit and accordingly the propelling force of the flipper.
