The BD Boost is Not Available as of November, 2015The simplicity of a top loading mountain backpack with freedom of movement is what Black Diamond says about the Black Diamond Boost. The ergoACTIV suspension is a cool idea - it is a shock absorber as well as a quick, custom-fit size adapter. The waist belt is attached to the pack with an apparatus that allows for vertical sliding/shifting, making for a quick fit as well as a smooth carry. We only found one obvious (but major) flaw with the design. If that major flaw (see Dislikes below) is fixed on future models this could become a cool feature of almost all backpacks. Until it is fixed you should read the rest of this review to find out exactly how and why it failed and why we think it may not be better than a traditionally designed pack. The other parts of the pack are all well put together and made from the best quality materials with some very innovative features. So it may come down to personal preference.
Compared to the other, very similar Black Diamond Axiom 30, I would choose the Axiom 30 because it has a normal, well padded back and no ergoACTIV suspension that can be a literal pain the back when you have to bend down. Or I would try another pack from another company since the Axiom 30 has its own flaw.