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Looking at a light weight bivi.
I like the Dutch army hooped one on eBay but they are pricy.
Has anyone used this Geertop bivi on Amazon and how does it stick rain.
Should I spend more an get a gore tex one.
I use a tarp over both wheels when out over night with the bike.
Ells
If you always use a tarp why do you need a hooped bivi? No experience of the one linked but I use an Alpkit bag, either with a tarp or if no rain forecast without tarp.
If weather going be really poor I take 1 man tent.
Niall nails it.
If you always use a tarp why do you need a hooped bivi?
*paging metalheart*
Err, that's not lightweight! My entire bivy setup of tarp, pole, pegs, bivy bag, sleeping bag and sleeping mat weighs less than that! (Admittedly that's the summer racing setup*)
If you always use a tarp then you only need a bivy bag to keep breeze and bugs off you. Any lightweight pertex type material will do the first, you need a panel of no-see-um to handle the bugs. Note that you can't fully seal Goretex/Event bivy bags because the material doesn't breathe enough to allow CO2 to escape, you have to have a strip or panel of something that does or design the bag so that it can't be fully sealed.
There are basically two sizes of bivy bags. Which you use depends on what you want inside the bag. The normal size will take you and a sleeping bag but your sleeping mat will have to be on the outside between the bivy bag and the ground. The larger size will let you put your sleeping mat inside. This is particularly applicable to inflatable sleeping mats like the Exped and NeoAir models.
The Alpkit Hunka bags don't have bug protection panels. I use the Hunka XL in winter because I can get everything into the bag and in winter everything is just so much bulkier. Here's some [url= https://www.ultralightoutdoorgear.co.uk/equipment-c3/tents-shelters-c25/bivi-bags-c41 ]lightweight bivy bags[/url]
* The kit is:
Cuben fibre tarp - 130g
Cuben fibre bivy bag - 135g
Carbon fibre pole and pegs - 100g
Cumulus 150 quilt - 365g
Klymit X-frame mat - 170g
Err, that's not lightweight!
I think the budget is around £50 seeing as the Dutch bags go for £90-£100 and are too expensive.
Last time I checked we didn't use grammes as a unit of currency 😉
If the OP wants the lightest bag for £50 or thereabouts then given the fact it will be used with a tarp and doesn't need to be 100% waterproof then [url= https://www.profabrics.co.uk/products/silnylon-ripstop?variant=6809804355 ]buy some silnylon[/url] and sew one up. You can seal the seam if you wish to improve the water resistance at that point. At 160cm width you'd only need a couple of metres.
Second hand Ebay army gore tex one. Mine was used by a private watson or so the name says. Relatively heavy but 20 quid. Or the aplkit hunka looks good.
*paging metalheart*
Need and want are two different things 😆
I got a cheap and cheerful bivvy bag from Mountain Warehouse, paid about £20 I think.
Unfortunately they don't seem to have them on the website at the moment.