This Slumberdown Anti-Allergy duvet inhibits dust mites, bacteria and fungus. Awarded the UK's Seal of approval, which is only given to products that have been tested and approved to very high standards by leading allergy specialists. This cosy 4.5 tog duvet is suitable for use all year round. It's non allergenic which means there's nothing in it that can cause allergies. :: Customer Review = 4.8