Many This Tribe and Army Rumour Service regulars will know that we developed our 3 season Kosa duvet jacket last year, with review samples sent out to Army Rumour Service and Kit Reviews users for comment (discussion here). Â While well received in general there were some significant flaws, particularly sleeve sizing, and we took the hard decision to go back to the drawing board. Â While we really like our own Kosas they weren't ready for sale.
We've been busy on the Kosa Mk 2 and just received two great prototypes that are ready for discussion and we would really value your opinion and feedback before we get the final pre-production samples made and start full manufacture.
The concept remains the same as the first Kosa - we want a jacket that should go in every kit bag. Â Lightweight, perfect for use under a field jacket (don't worry about the blue yet!), suitable for damp UK weather, but stylish enough to wear out to the pub on a night off on R&R.
We had two prototypes made, see below. Â Both use ripstop windproof and DWR treated outers, with the same excellent mixed synthetic and down Multitherm fill as the first Kosa. Â Zips have been upgraded and other minor niggles sorted out.

Version 1 - shows new vislon zips, upgraded pull tags and heavier ripstop fabric

Version 1
The first version is in a tougher fabric than the original Kosa with a strong ripstop hexagonal pattern. Â The jacket has the feel of workwear and while undoubtedly rugged is, we believe, too difficult to compress, but also reduces the loft of the fill as the heavier fabric compresses it. Â We do think it looks great though, even in these quick snap preview shots.

Shows lightweight ripstop fabric, plus the same upgraded zips as the black version above. More about the colour in a moment...

Kosa in the same weight fabric as the original Kosa, but with ripstop reinforcement.
The second sample is, yes, very blue. That was just coincidence and just because the blue fabric was available for the sample, but actually we really like it. What do you think? It's not going to go under a combat jacket, but is a great casual jacket. Your opinions welcome.
The fabric is a similar weight as original Kosa - very lightweight and suitable for mid-layer or casual use. The light fabric allows the filling to loft well, and the jacket feels lovely as soon as you put it on - instantly warm and feather-light. Â Also it is pleasantly matt - we've been trying hard not to produce a shiny jacket.
Zips are upgraded as on the black version.
Both jackets are more roomy than their predecessors, particularly in the arms. We've yet to receive a full set of sizing samples, but so far the sizing seems spot on.
So, in summary, we're going for a black version of the lightweight ripstop jacket shown in the photos, with some minor modifications such as badge design, slightly larger pockets and improved hanging loops.
Two questions to you if you have a moment: Â Should these include a stuff-sack (as the first Kosa) or is that just a waste of money, and should we also do the jacket in blue? Â Which would you buy if it were one or the other?
Finally, we will likely offer a heavily discounted pre-order opportunity for those on our mailing list, existing customers and Army Rumour Service members. Â The best way to ensure you receive the offer is to subscribe to our mailing list.
Launch will be September 2013.