Hi to all,
for those looking to extend their pack volume or add a bit more of packing/carrying options to their gear carry I recommend to look at Locus Gear Nanos bag. I did a short review of it on my blog site and after some use of it I can say it's realy lovely piece of kit. Just few basic here: it adds ~3,5l of extra volume for ~65g extra weight and does offer few packing options with extra mesh pockets.
Cheers!

