![]() ![]() I'm concern that the gear I have won't be warm enough for when I'm stationary (when I'm in the peaks) or at the tea houses (in the evenings when I assume it is colder with no wind at all).Īt the beginning I though of buying Atom SL as another mid-layer, which adds another warmth and it has light wind protection. While I think I will manage with the gear for when i'm moving thru the trek itself. Mid layer: Arc'teryx Delta lt and Arc'teryx Atom LT The temperature range will be 15c to -10c (59f to 14f) and the wind is about 5-6 mph. Go for a Neutrino Pro if your a big fan of biving (grim!).I'm planning to trek in April in the Himalayan mountains (Everest base camp, kalapathar, Chola and gokyo ri). The construction is very lightweight, which is great if you are in a tent and you have some protection between you and rocky ground. If you are looking for something burlier there is the Neutrino Pro range which are essentially the same design at the Neutrinos but with a much burlier outer fabric. It gives you an amazing amount of warmth for under 1kg and is actually comfortable and roomy unlike some ultralight racing suffer-fest bags. In all the Neutrino 400 is an excellent lightweight bag for 3 season UK conditions and summer Alpine trips. The stuff sack is shaped longer and narrower than most so will work well in Bike Packing luggage too. ![]() The Neutrino comes with a waterproof rolltop stuff sack. ![]() The pack size of the XL is obviously a little larger than the regular but it still only takes up around 3L of volume. I’m 6 foot so have been using an XL, which I would definitely recommend if your are bang on 6 foot or taller. ![]() The Neutrino 400 is available in regular and XL. Collar: We are Rab – The complex stitching people.īy using lightweight materials and high quality down the pack size is very impressive. It looks like a complicated fabric patterning and stitching flex on their rivals but wow does it do a good job of keeping the warmth in. Inside the hood and around the neck is a shaped down filled collar. They also reduce the amount of down that will move round to the sides of the bag in the night. Baffles means stitching and stitching means colds spots, therefore less baffles means less cold spots. This allows more of the bag to be covered by less baffles. The most obvious one is the new chevron baffle design. Rab have added some nice features to the new Neutrino bags. However the feet and torso feel much roomier than some other brands so overall you do not feel constricted. The Shape is quite tapered with the area around your shins being quite narrow. I was sat in a freezing tent with my breath misting up, but feeling comfortably warm without the usual feeling of weight around you. The lightweight fabrics and 800FP down create the strangest feeling of warmth without any weight. The liner is a lightweight ripstop nylon which feels comfortable against the skin. This super light fabric is windproof and has a DWR chemical treatment so it does not absorb water. The Neutrino 400 uses Pertex Quantum outer fabric. As a very active sleeper who tends to roll around a lot one thing I did notice was as I rolled over, the area of bag that had been compressed under me very quickly lofted back up, preventing a cold spot. The bag does loft up very quickly after removal from the stuff sack (more on this later) and was pretty much ready to go after a couple of minutes and a shake out. Having lucked out with the weather, the conditions were not very damp so I’m yet to test this. This is intended to improve the loft of the down in damper conditions i.e the UK, where down insulation traditionally performs poorly. The down is then treated with a fluorocarbon free hydrophobic chemical. The Neutrino range is filled with 800FP Goose Down from European sources. With temperatures dropping to around -1 over night due to clear skies and the fact that its still early April I was pretty glad of a warm down bag. I’ve been using one for a few weeks, first off on an overnight trip to the Lakes. With a temperature limit down to -7C its a great bag for 2 to 3 season use in the UK. The Rab Neutrino 400 is the mid weight bag in Rab’s redesigned Neutrino review. ![]()
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