Arc'Teryx Men's Altra 50 Backpack Polypropylene C1200 III offers 95% circuit

C1200 III offers 95% circuit efficiency and extremely high output of 524 LED lumen (Cool White version)

with ergonomic grip shape

Battery: 4xCR123 0r 2*18650

Waterproof up to 2 meters

Battery: One two AA batteries

Arc'Teryx Men's Altra 50 Backpack Polypropylene C1200 III offers 95% circuitThe smaller volume Altra packs, (Altra 33 through 50) keep weight to a minimum by using the efficient C2 (Composite Construction) system. The larger volume Altra packs (Altra 62 through 85) have a Load Transfer Disc that pivots to increase agility and stability on rough terrain and combine the C2 (Composite Construction) suspension with Gridlock shoulder straps that adjust for custom fit. Trekking Near or Far Composite Construction (C2) eliminates