How’s about this for confidence in your product?
Luis Brown, an Envornmental Consultant at Nikwax demonstrated this by floating across a lake in East Sussex with a Nixwax Hydrophobic Down™ filled sleeping bag. They demonstrated that it’s a high performing hydrophobic solutiuon as well as also being an environmentally friendly one.
Nikwax do however stress that this isn’t a literal example of what should be done with the product, though we admit that we’d be quite tempted to give this a go!
We reckon this would be just about right for a typical wild camp in Snowdonia, on a dry weekend!