This duvet is highly recommended for people with eczema and dust mite allergy. It is not dust mite proof but can be washed regularly on a hot wash which will keep it dust mite free. Made completely of natural fibres, it is lightweight and keeps the body from overheating. With a tog guide of 4.5, it is perfect for the summer months and also for the cooler months for people who tend to get hot at night. This duvet has an Oeko-tex standard 100 cotton cover and is filled with 60% wild silk and 40% cotton. Washable on a hot wash. Cool tumble dry.