Tufas are some of the most unique shapes to form in nature. Their bulbous features make for incredible climbing experiences as you pinch your way up the wall. Now, thanks to the Sandstone Tufa, you don?t have to fy halfway around the world to climb on these pinching marvels. This positive pinch is accessible to all ability levels. Set amazing boulders of all grades on walls of all shapes and angles. With the Sandstone Tufa in your bucket, the options are limitless.