PRICES MAY VARY. You can block out the light in under 15 seconds and won't damage your curtains. This product is ideal for the sensitive sleeper, traveler, and child. The Curtain Clip Pro promotes physical, mental, and emotional health by enhancing better and longer sleep. The company was created by two working moms that wanted to focus on individual and family well being. The Original Curtain Clip Pro is designed to enhance and promote healthy and longer sleep by forcing curtains to close properly, blocking out unwanted light. Our product is ideal for babies, kids, adults, and travelers wanting to improve important sleep habits. It’s gentle on your curtains and easy to use!