Since we talk a lot about this pack I though I would write down my first impressions. Context: I got the lightning 60 as a winter pack that can carry a bulky 0F sleeping bag, ice axe, shovel, snow shoes, crampons and extra fuel. The compression system and internal frame for such a reasonable weight made it my first option. I bought it second hand withowithout trying it before. Its also a men's version (despite me being a petite lady, hard to find lady's version second hand). First impressions: - It took me quite a long time to get the initial adjustments, It is so adjustable that finding the right combination was not easy. - I found the adjustments but it is a bit on the long/big side for me though and if I lean my head back it touches the stay. - The pack sits quite high and is narrow compared to say osprey bags. After carrying it around the hills with 12kg of random weight: - The lack of padding on the uper back is weird at first. But playing with the strap adjustments I eventually was not that bothered. - The hip belt is nicely cushioned. - The transfer weight is fantastic. - The side pockets are great, so easy to chuck things in there. Will try it more this winter see if I still like it. Im not 100% sold but 85% there.