The core conditioning sliders I ordered from tumbltrak are very high quality sliders that you can put beneath your hands, or your feet. We like to use them during serious drills, like practicing cartwheels, but we also use them just to have fun. Our favorite thing to do with them is you can put them beneath your feet, and it makes you feel like you’re ice skating! We also love to do cardio and strength warmups with them. All in all, these sliders are another great purchase from tumbltrak!