Alpha FL packs were created for climbers and alpinists who want a light, durable and highly weather resistant pack that is pared down to be as simple as possible. No extraneous straps or parts. To save weight and provide the climber with easy access to contents, the traditional top lid has been replaced with our RollTop closure and an external security pocket. The RollTop provides a weatherproof seal, extends the packs volume and when not needed tucks inside the pack for quicker access. External lash points can be used to attach tools, crampons, extra layers, helmets, sleeping pads, etc. Shoulder straps are soft-edged and carry extremely comfortably with heavy or light loads.