Hollowfibre: The foam is surrounded by hollowfibre meaning the pillow is soft but supportive. Ideal for people who sleep on their back or side. Pillow: Get this Silentnight anti-snore pillow! Hypoallergenic: Made of 70% polyester, 30% cotton. This product does not contain any materials likely to cause allergies. Reduce snoring: Designed to help reduce snoring, the clever ergonomically shaped foam lies within the fibres of the pillow, ensuring your head is in the right position to improve breathing. Tried and tested: : Tested by the British Snoring & Sleep Apnoea Association who found the pillow reduced snoring frequency and volume by approximately 50%. Dimensions: 74cm x 48cm. | Silentnight Anti-Snore Pillow | Wowcher