Make sure to check out the full Mountaineering and Alpine Climbing Backpack Review to see how the Ice Pack compares to the competition.
It is extremely lightweight for its capacity, very comfortable, simple in design, and made from a Cuben Fiber/polyester hybrid fabric that's seam sealed, meaning it's 100% watertight- a unique feature among the packs tested. The fabric, although very light and extremely strong in terms of tear-strength, is more susceptible to abrasion than the average alpine pack tested here. For this reason we found that the Ice Pack is best used as an ice climbing or alpine snow/ice pack (as the name implies) rather than as an alpine rock pack. Previous editions of this pack had certain features that were lacking (the crampon attachment for example), but HMG has been refining the design, and the newest Ice Packs are fantastic.
If you're looking for a go-to smaller pack, or a pack primarily for long alpine rock routes consider the CiloGear 30L WorkSack or CiloGear 30:30 WorkSack. If you need a pack for epic, multi-day technical endeavors in the world's greater ranges, check out the CiloGear 45L WorkSack.
The latest model of the Hyperlite Mountain Gear 3400 Ice Pack appears to have the same features since we last reviewed this pack; however, we have contacted Hyperlite and we are awaiting their reply.