Don't think it's ever been used over night. But definitely been tested in the garden.

The Alpkit Hunka Bivvy Bag in Kelp Green is a reliable and versatile outdoor sleeping essential for camping and hiking adventures. Made by the trusted brand Alpkit, this bivvy bag provides quality insulation and protection from the elements, ensuring a comfortable night's sleep while out on the trails. Perfect for solo camping trips or as a backup for emergencies, the Alpkit Hunka Bivvy Bag is a must-have for any outdoor enthusiast looking to stay warm and secure in the wilderness.