Catherine Lansfield is renowned for style and quality - designed and developed in Great Britain. To see the glow-in-the-dark effect at its best, this product should be exposed to either day light or household lighting for at least 30 minutes before bedtime. The effect will initially become more obvious as your eyes adjust to the dark. There will still be some visibility of the glow effect for at least 30 minutes after you switch the lights off. Double Duvet Set- 200x200cm + 2 50x75cm Pillowcases. Wash Before Use. Machine Wash at 40 Degrees, Tumble Dry Safe. Ethically sourced overseas and made to quality and human-ecological safety standards, in accordance with STANDARD 100 by OEKO-TEX.