Ultralight Composite StaysLightweight does not mean light duty.
Shave off up to 9 ounces from your pack with these stays, yet
retain critical load carrying stability. A blend of hardwood and
carbon fiber deliver exceptional strength, unlike most other
maker's frames that twist or cave in when heavily loaded.
Designer's Notes:"Flexible” pack stays simply are not
suitable in a real backpack. With any load at all they
collapse downwardly, wrecking the contour of the pack and
inevitably placing it’s weight onto your shoulders instead of your
hip girdle where it belongs. After long research we abandoned
pure carbon fiber and developed an innovative and proprietary stay
consisting of a hybrid laminate of carbon fiber and exotic
wood. This composite stay was developed to provide exactly the
same rigidity as the rugged aircraft aluminum stays that have been
part of the legendary comfort of our regular packs—but at
drastically less weight. This long road traveled means you get
exactly the same comfort from our KU packs as our standards, a
worthwhile achievement indeed. They are so good we are
offering them as an option at order time on all our regular packs
as well. They are also available as retrofits for all our
The over-arching idea is to transfer the pack's weight to your hip
girdle, which is far better able to handle weight than your
shoulders--allowing you to travel farther, faster, and be less
tired along the way and especially at your
The "lift" comes from a mechanism attached along the length of our
rigid pack stays; these stays also support the whole pack and give
it the correct contour so that our anatomical lumber pad and
waistbelt cushions its ride on your hip girdle AND serve as the
anchor points for this shoulder strap lifting system. The
system connects from the stays to the top fronts of the shoulder
straps, and when engaged, literally raise the straps off your
shoulders so that no weight is bearing downward onto them. For
this to work the stays must be higher than your shoulders. The
height must be tall enough to allow for an angle between the tops
of the shoulders and the location of the lifting mechanism on the
stay. This angle is important. If there is no angle, the
lifter strap functions more as a "snugger" strap. Much taller
and the lift angle makes the pack less secure. Our system is
unique--it is the only system that allows for infinite up-down
adjustment so that you get precisely the right lift angle that
All of this must account for your anatomy, especially your height
and to some extent your torso length within your height profile
since the pack rides on your upper body. Shorter people need
shorter pack stays to achieve a correct lift angle; taller people
need longer stays to accomplish this.
From Anonymous of Castaic, California on 8/29/2015.
Replacement of the aluminum stays was fairly easy - I recommend that you write on the old ones to indicate their orientation (i.e. top front, bottom front). Other than the lighter weight, I didn't notice a difference in the fit - still very comfortable.
8/10/2016 – How do you swap out the stays. and what are the weights of them?Thank you.
Response From Kifaru Intl.: Hi Jared -26" Composite stays weigh 90g each26" Aluminum stays weigh 155g eachThe process for swapping out the stays really just consists of pulling out the old stays and replacing them with the new ones. Sometimes pulling the old stays out is easy, other times it can be really tough. The best way I've found is to wrap the ends of the stays in a towel or some other padding and then secure the stay in a vise and then pull the pack frame up and away from the stays.
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