I’ve been hoping to test a Mountain Tools pack for a couple of years now and early this summer I finally got my hands on one of this California companies new models, the ultra-light sleek and streamlined Mountain Tools Slipstream Pack.

After multiple cragging days on Cathedral and Whitehorse Ledges, some fast & light missions in Huntington Ravine, and some excellent alpine climbing in the northern Cascades, I’m ready to share my opinions of this pack. As usual I like to start with the obvious and work through the minutiae later on in the review.

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Weight

Weighing in at only 11 ounces (310 grams) this pack seems to accomplish a lot with its design. For comparison one of the most popular similar styles from a competitor weighs 8 ounces more! The foam back pad is removable if one wishes to save yet another ounce but I prefer the padding stay intact when carrying an alpine rack with a few cams that might otherwise prod your back a little. Because this pack is so light I’ve been able to comfortably strap it to the outside of my Hyperlight Mountain Gear 3400 Ice Pack for multi-day alpine climbs when I wanted to have a smaller summit pack along.

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Durability

Made of 210 denier nylon with a polyester grid the material feels quite bomb-proof and abrasion resistant in hand. A “PET” laminate and hydrophobic webbing makes this pack highly water-resistant if not completely waterproof. After about 20 days of use the only noticeable wear is a small tear on the bottom, smaller than a dime, from a razor sharp rock I didn’t see during a quick “butt scoot” move while running down the Huntington Ravine trail. I’m certainly not disappointed that the material ripped on this feature and actually quite impressed with how fast the “rip-stop” material halted the tear. A lesser pack fabric would have probably ended in a much larger tear.

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Comfort

This pack is designed to ride close and high on the torso for optimum climbing performance. As I mentioned I find the removable thin foam back pad to be a boon in comfort so I leave it intact. The shoulder straps have thin foam padding and contour nicely around my shoulders. The sternum strap easily adjusts to the proper height and has my often praised feature, the built-in whistle. The waist belt is very thin and easily rides above my harness. A “V” connection of the waist-belt to the pack body helps draw the pack in closer to the body further making this pack ride as if it were part of you. Considering the light loads you are likely to be hauling in this pack it is more than enough comfortable!

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Storage

At 1,450 cubic inches (24 liters) one does have to consider what they will be carrying. I can easily fit the following gear inside the pack (and generally pack it in this order):

Black Diamond Alpine Start Hooded Jacket

AMK .7 First Aid Kit

SOL Emergency Bivy Sack

Nalgene Tritan 32 oz water bottle

Standard Trad Rack (set of Wallnuts, BD X4’s .1-.4, BD C4’s .4-#2)

Set of 5 alpine quick-draws and 2 mini-quads

Personal Climbing Gear

Five Ten Rogue Climbing Shoes

AMK .7 First Aid Kit

Inside the zippered mesh pocket I keep my Petzl Zipka Headlamp, some lip-balm, and my energy gels/bars.

Full length daisy chains on the outside of the pack allow easy attachment of my Petzl Sirocco Helmet (review here)and chalk bag. The two compression straps allow securing of a climbing rope.

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Accessories/Hydration

It would be great if Mountain Tools could add a single ice axe loop. There is an accessory offered for $7.95, “Ice Tool Straps” that probably addresses this desire but I think a single sewn loop at the bottom would be a great addition. The foam back panel sleeve does have room for a 2-3L hydration bladder but there is no hydration port so you would have to run the tube through the main zipper. For this reason I like to stick with a collapsible water bottle like the new Vapur Eclipse 1L water bottle I’ve been using. “Speed Racks” are also available for an additional $29.95 though I did not get a chance to demo that accessory.

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Summary

While at first look this pack doesn’t seem to be that complicated its design reveals simplicity, functionality, and durability. It is an almost ideal summit pack, light enough to “piggy back” on your overnight pack, compressible enough to double as a sleeping bag stuff sack, durable enough to scum up countless chimneys, and balanced enough to skip down many more descents. If you are in need of a fast & light summit pack this one deserves some consideration!

About Mountain Tools: Mountain Tools is a family owned business serving climbers and mountaineers since 1980. We represent a comprehensive selection of gear from the best manufacturers and ship to our customers world wide and design and manufacture over 100 products – with the Mountain Tools label – to improve our climbing efficiency – including our  Packs for Climbers, Web Gear and Climbers Luggage.  Our experience includes outfitting expeditions, big wall climbing, guiding rock, ice and alpine treks plus volunteer search management and technical rescue. 

Disclaimer: This sample was provided to the author for purpose of review. Affiliate links help support this blog.