When it comes to pogo stick design, the V4 is without question the most advanced pogo stick ever made. We took the traditional spring pogo stick and tossed it in the trash years ago. Since then, we've been creating pogo sticks that use our patented air spring instead of a metal spring. Springs are cool and all, but they can't be quickly adjusted to accommodate different weight riders, they're heavy, and they just don't have what it takes to jump high.