Reviews You Can Rely On

K2 Backside Float 30 Review

Though slightly heavier than most, it isn't WAY heavier and all of our testers appreciated how well this pack carried and moved with us while we skied and after dozens of days of use we ended up LOVING its well thought out and useful features
K2 Backside Float 30
Photo: K2
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Price:  $600 List
Pros:  Lots of features make the pack user-friendly, very supportive frame, Comfortable, moves well while skiing and snowboarding
Cons:  One of the heaviest airbag pack in our review
Manufacturer:   K2 - BCA
By Ian Nicholson ⋅ Review Editor  ⋅  Apr 6, 2017
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  • Airbag System - 20% 7
  • Backcountry Utility - 22% 9
  • Comfort - 12% 9
  • Performance - 13% 8
  • Features - 15% 10
  • Weight - 18% 6

Our Verdict

The Backside Float 30 is Discontinued as of April 2017
The K2 Backside Float 30 is a feature-rich pack for all-day touring or snowmobiling. It has a ton of convenient pockets, solid backcountry utility, a plush suspension, and the ability to carry a snowboard vertically and skis diagonally or A-framed, all at a reasonable price. The thing that kept the Backside Float from being rated higher was its weight. At 7 lbs 14 ounces, it's the heaviest airbag pack in the review. While only 6 ounces heavier than our Editors' Choice award winner, the Black Diamond Halo 28 JetForce it is 8-16 ounces heavier than most comparably sized airbags in the review.

Our Analysis and Test Results

Performance Comparison

K2 Backside Float 30
K2 Backside Float 30
Photo: K2

Airbag Features

The K2 Backside Float 30 uses the same system as Backcountry Access' Float line of airbag packs. The Backside Float uses a single 150L airbag that deploys from the top of the pack through a breakaway zipper. The size and shape of K2's bag is very similar to the airbags used in the Wary and Mammut RAS series and obviously identical the BCA's. While the K2 Backside Float 30 airbag doesn't offer anything like dual bags for redundancy or a head/neck wrap shape like the Mammut Protection Airbags, this design has still proven equally as effective at keeping the wearer on the surface. The Backside Float offers no redundancy like the ABS packs, but our testers can attest to their durability and were impressed by how much effort it took to put a hole in one with an ice axe. Even after we finally managed to put a hole in it, it still managed to inflate fairly firmly and took more time than we expected to deflate.

Trigger Mechanism

A cool feature of the K2 Backside Float 30 is that the trigger can be worn in either the left or right shoulder strap, helping widen the range of users. Ski and snowboard tourers can wear the trigger in the shoulder strap so that it makes it easiest to grab with their dominant hand, while snowmobilers can wear it on their right side so they can grab it with their left hand and keep their right hand on the throttle. The trigger mechanism itself is a very simple, but extremely reliable mechanical pull attached directly to the trigger handle.

Comfort and Fit

The K2 Backside Float 30 features one of the more plush suspensions among airbag packs in our review (possibly the most plush). The Backside Float features metal stays to help spread the load, and we think that it has the most comfortable padding all around. The face fabric on the shoulder straps feels really nice, making it even more pleasant if lightly clothed in only a base layer (or less).

Performance on the Down

Despite the slightly-stiffer-than-average frame, our testers were impressed with the downhill performance of the Backside Float 30 and thought it was above average among packs in our review. We also thought it moved with us while skiing or snowboarding better than nearly all the other 30L and larger packs.

Backcountry Pack Utility

The K2 Backside Float 30 is a very heavily featured pack offering a lot of small zippered pockets, including a fleece lined google pocket on one side that can be accessed without removing the pack. Our testers liked the snow safety gear pocket which is larger than average and fits most medium and larger sized probes and shovels while still leaving room for potentially wet skins. This "wet room" helps the user keep the contents of the main compartment to stay dry. The Backside Float 30's snow safety gear pocket zips open 2/3 of the way around, similar to the Back Country Access Float 42. This was fine, but we like the complete U-shape opening of the BCA Float 22 and 32 slightly better. We did like the Backside Float 30's "wet room" pocket better than the similarly priced Mammut Ride RAS packs, which were noticeably smaller.

Our testers really liked the two convenient zippered waistbelt pockets and found them big enough for small items like bars, an Inclinometer, or a smaller point-and-shoot camera. We also liked the low profile and tram friendly ice axe holder that keeps both the spike and the pick completely covered. Or conversely, for longer axes, there is a hole in the bottom of the snow safety gear pocket for the spike to stick out the bottom of so it can be carried inside the pack. We found the removable mesh helmet sleeve super functional and it fit every helmet we tried, from low profile climbing helmets to proper snowmobile helmets.

Carrying Skis or a Snowboard

The K2 Backside Float 30 is one of only a handful of airbag packs that is designed really nicely to carry skis, or a split-board split vertically or diagonally, or a traditional snowboard vertically. The ability to carry your skis or split-board A-frame style is nice for long approaches because it tends to sway around less, but K2 and all other manufacturers don't recommend it while traveling in avalanche terrain because of the possibility that it might interfere with deployment.


At 7 lbs 14 ounces (including a full canister) the K2 Backside Float 32 is the heaviest airbag pack in our review, just barely weighing in heavier than the similar volume Black Diamond Halo 28 (7 lbs 8 ounces) or the Black Diamond Saga 40 (7 lbs 11 oz). Unfortunately, it's 13 ounces heavier than its closely designed cousin the Backcountry Access Float 32, which tips the scales at 7 lbs 1 ounce.

Overall Cost Breakdown

Airbag pack costs can sometimes be confusing or misleading because some manufacturers include the cartridge in the price and some don't, while others may or may not include the actual airbag system. K2 Backside Float 30 breakdown: the back with the airbag is $600, and the canister (which is sold separately unless specifically labeled) goes for $175, for a total price of $775. If you already own a BCA pack (or are thinking about getting one), the canister is 100% interchangeable.

Value and the Bottom Line

At $600 for the pack and $175 for the canister, the Backside Float 30 is a pretty good, but not excellent value. It's a little more expensive, but still in the ballpark price range of most of the Mammut RAS packs and the Backcountry Access Float Packs, and it offers a few more features. This include lots of organizational options, and we think it's burlier than most. Basically the main reason to buy the K2 Backside Float is because it has loads of features and an overall comfortable feel. Why wouldn't you buy it? Because it's the heaviest airbag in our review.

Ian Nicholson