Lightweight duvet button clip suits for quilt, duvet, cushions, curtains, Just take one clips caps and plastic pin, take the steel needle to fit in the plastic pin, then cross the duvet, remove the needle, cover the the cap, finally, your sheet won't shifting. When you want to remove it, you can press the button to unlock it directly, which is very easy to remove. mattresses, bed sheets, tablecloths, sofa covers and so on. Using these buttons can save your time or effort, and not damage quilt or make it heavy, keep comforter from shifting.