Made with materials used by NASA, this sleeping bag claims to work in -40°C… but does it?

We test a prototype Biigloo sleeping bag in subzero conditions, with very mixed results…

Related Keywords

China ,United Kingdom ,Chinese ,Britain ,Pat Kinsella , ,Biigloo Sleeping Bag ,Antarctic Siberia ,Alpkit Whisper ,Alpkit Soloist ,Alpkit Pipedream ,Rab Neutrino ,