Q Where does down come from ?
A The chest of Ducks
Q What is the 'natural environment' for Ducks ?
A On the water.
Ducks don't seem to have any major problem with water, some simple 'taking care' of your down-bag is all it takes.
Don't use it as a boat or go swimming in it & let it 'air out'...
I am fortunate to have an "Open Licence" which allows me to self certify any land as safe for whatever calibre I want to use on it (not anyone else) If you don't have an Open Licence then you can only use the land with :
a) The land owners permission
b) A calibre that has been approved as 'safe'...
You'd be welcome to shoot over my land (It is cleared by the Police for up 7.7mm centre fire) so there would be no problem with an air rifle.
I'd guess our location (top half of Lincolnshire) makes it impractical for you in Romford.
Not really an answer to the question, but another option.
I paid 99p for this off ebay.
It has lost 2 minutes in 18 months, is splash-proof and I can afford to loose it or break it.
When doing anything 'energetic' my expensive GPS watch goes in the pack and the 99p one comes out.
Four Idiots climb Ben Nevis wearing trainers in the middle of Storm Ciara putting 22 Mountain rescue volunteers in danger.
Four 'absolute idiots' are rescued from Ben...
Replaceable ? - No it is use and dispose - it will filter a minimum of 300 litres.
It supposedly removes organic compounds and improves the taste. It certainly does...
I use the Platypus inline filter.
Put it in the output side (clean water) and it removes any lingering 'taste'.
Available all over the place, this was just the 1st link that came up on google
It is the...
Berghaus 65 litre
Supplier Amazon : https://www.amazon.co.uk/Berghaus-Mens-Trailhead-Litre-Rucksack/dp/B073QM3TSH
Waterproof (but probably not 'storm-proof') but has a separate cover for extreme weather.
Comfortable with adjustable back support / height
I never trust...
The likes of Poundland, Home Bargains etc sell small tins of Vaseline (about 1" diameter)
Scrape out some of the Vaseline and fill the space with 'make-up' pads of cotton wool. They squash down well and you can get several in the 1/2 full Vaseline tin.
The tin is waterproof and you have all...