Originally Posted by
LyndaOH
One is the Supreme Slider -
http://www.freemotionslider.com/
There are others that are less expensive, and other materials you can use. I've used a piece of clear vinyl and that works fairly well.
I just purchased the queen-size Supreme Slider and really like it. I searched the Internet for a bit and found a great price for it and the Quilt Halo ring. The backing of the slider must have been improved as it really grips. Other threads I've read mention that it gets caught in the quilt sandwich at times, but I've had no issues.