Sheep's wool is an excellent filling for sleeping bags! The Bavarian company Grüezi bag proves this with its award-winning models. The magazine 'outdoormarkt' reports why the wool and wool-down sleeping bags from Grüezi bag act like a 'natural air conditioner' on the body. Read the report of the article from April 2019 for download: Outdoormarkt issue 04-2019-page 14-Grüezi bag sleeping bags