However, all Cilo packs are made to order in Portland, Oregon, often involving a delay in delivery. Cilo Gear packs are not widely available at major online retailers, so if you can't get to one of their retailers and need something soon, consider the Black Diamond Speed 50.
If you want one all-purpose pack that's also large enough for multi-day winter climbs consider the CiloGear 30:30.
If we were to choose two packs for climbing primarily in North America we'd get the Cilo 30L WorkSack and a Hyperlite Mountain Gear 3400 Ice Pack, the latter of which is more comfortable for hiking and lighter than the CiloGear 45L WorkSack.
Check out the complete Mountaineering and Alpine Climbing Backpack Review to see how the 30L WorkSack compares to the competition.