*INDOOR USE ONLY | RAMP ASSEMBLY REQUIRED* New-and-improved modular ramp design (Patent Pending) The BirdieBall PuttUp® features a newly designed modular return ramp with long putt feedback. Need to practice those difficult long putts at home, but working with limited space? Not many of us have 20+ feet of space to set up a long putting green at home, so BirdieBall has engineered the perfect solution to get a feel for those long putts in a much shorter space. When you putt uphill on a ramp, you are applying additional energy to that putting stroke that needs to be accounted for. The PuttUp® Ramp is the first putting ramp that takes into account the additional energy needed for your ball to travel up the ramp and scientifically translates that additional energy into corresponding lineal putt distances.  For example, on a 10' long green, aim for the hole lined up with +12' marker on the ramp to practice a simulated 22' long putt. The PuttUp® is a 2-in-1 green. Use with the ramp installed to simulate longer putts, or remove the ramp to practice on a perfectly rolled flat putting green. With the ramp installed, simply line the holes up with the corresponding marker on the ramp to practice a putt of that additional distance from where you are standing. Freely move your putting green up or down the ramp to line up your holes with the distance you would like to practice. Already have a putting mat and just looking for the ramp? Purchase the PuttUp® Ramp separately. Note: Please allow for extra time in production (up to 5 business days)