In reply to phizz4:
I have to confess to being a bit of a Lowe Alpine fan, but not of the "headlocker" axe shaft strap system. It has often been pointed out that combining the tool attachment with the side compression side straps is a nuisance if you carry skies (or anything else in the side straps) and end up loosening both when you access an axe .
I sold on a last model Alpine Attack when I got fed up with the strappy faffiness and went back to an old Crag Attack II (the post ripstop upgrade one). That has been the sack I keep going back to for comfort and useability. Despite being marketed as an entry level sack, it still comes closest to my ideal of what an all round (and scottish Winter) sack should be, and came in at 800g for 42 litres.
Long discontinued, but for info...
https://www.trekitt.co.uk/dpt/pgr/lowe-alpine-crag-attack-ii-42-chilli-red_...