Flip Hole is one of the revolutionary concept from TENGA debuting almost 10 years ago. The biggest change in the flip design is that the "hinge" of Flip Zero is at the entrance of the sleeve rather than the back. This design change increases the durability of Flip Zero as the soft material of the sleeve now act as a hinge rather than the thin hard plastic frame of the original. The original Flip Hole's thin hinge tends to be the first thing to break over time so TENGA has targeted this weakness with their