We realised that our customers journey through some places so cold that a bivvy on its own, no matter how good it is, just won’t do. And some of our customers, believe it or not, even enjoy a bit of comfort from time to time 😊
So we set out to create a real sleeping bag weighing a mere 450g (less than a block of butter) and make it as warm as possible with a fill weight of 150g pure goose down.
To achieve that we needed use up as much of that weight allowance as possible for insulation and the least possible for the other stuff. No zips, buckles, clasps, baffles, cowls, velcro thingamies and other bells & whistles that don’t add warmth. A rip-resistant reversible casing as lightweight as possible, whilst still being durable and water repellent. The same evolved and optimised shape as the RADBAG Original: 2m long, 76cm at the shoulders and tapering down to a narrow footbox. A simple drawcord: silent, unlike a zip, effective at sealing the bag above your shoulders or over your head, keeping all that warmth inside.
Then we fill it with the highest quality lightweight expandable insulation known to man: pure goose down, until it weighs 450g, including its perfectly sized stuffing bag, sewn onto the foot of the sleeping bag in the usual RADBAG way.
Approached like this, that turns out to be quite a lot of down for a bag of this weight, which translates into what we believe to be the warmest 450g sleeping bag currently available to adventurers anywhere.
