Brighten your vibe with the rainbow print design of Sun Zero rainbows curtain panels. Sun Zero generation blackout technology is lab tested to block out 100% of light, reduce outside noise by up to 55%, and decrease energy lost through your windows by up to 35%. Fleece insulation keeps inside air cooler in the summer and warmer in the winter. Built-in grommets allow for easy slide-through installation on curtain rods up to 1.5 in diameter.