Exercise Sliders - Workout Sliders | Sliders with strap - Sliders for working out

I'd like to know if I could return them actually. They made a huge, white skid mark on some carpet at my gym. Near the front of the slider on the bottom the plastic became rough and left some tough marks on the floor.

Never worked out with sliders before. But the flexibility on core workouts is pretty awesome. I have a big foot (size 14) so the straps are a little tight and can fall off, but like the sliders never the less