Arcteryx Alpha FL 30 Option:Vitality 1 internal zipped security pocket

1 internal zipped security pocket and 1 internal dump pocket

The biggest performance difference you are most likely to notice is the DWR treatment

Coreloft Compact 60 synthetic insulation

2 x Disphenhydramine (treatment of allergies)

2 Way centre main zip

Arcteryx Alpha FL 30 Option:Vitality 1 internal zipped security pocketThe Arcteryx Alpha FL 30 is a great minimalist 30 litre pack for fast and light use in the mountains, ideal whether you're rock climbing, alpine climbing or ski mountaineering. It's very light for a pack of it's size, yet don't let this deceive you the 315 Denier HADRON AC Nylon is super, super tough. The pack has a simple Roll Top closure, which when fully extended gives the pack additional capacity up to 37 litres. The 315D HADRON AC2 Nylon is