This indoor/outdoor putting green allows you to adjust its contour and has six different aids that improve ball striking, club path, and putt alignment through repetition and muscle memory development that can increase one-putt performances. A string guide runs from the front of the green to the hole and corrects imperfections in your club path by providing a guide for your putter to follow. The stroke block lies on the green, perpendicular to the face of the putter, and measures the lengths of your backstroke and follow through as you swing, ensuring an even stroke to prevent ball deceleration that leaves putts just short of the cup. The block improves square face impact as the putter strikes the ball by restricting inside-out or outside-in swings. To further improve ball striking, the underside of the block has a groove in which a golf ball is placed and marked with a felt-tipped pen. This course-legal line on the ball is aligned with the guide string before each stroke, and if the ball is struck correctly, the line on the ball will travel end-over-end towards the cup instead of wobbling across the green. A white hash mark attaches to the rear panel behind the cup and allows you to visually align the flagstick with the hash mark. When the hash mark disappears behind the flagstick, your eyes are directly over the ball, resulting in optimal putting position. The cup insert reduces the size of the hole, forcing you to aim for the center of the cup, and foam contour pads can be placed underneath the turf to practice putting over subtle breaks. Putting green is weather resistant and platform adjusts for left-handed golfers. 9'3" L x 22" W. (50 lbs.)