Date 11.01.18
Skis K2 Annex 108, 170cm, Fritschi Vipec.
The first day skinning at Alta presented no fit issues. The boot was warm and had enough cuff range of motion (ROM) for what I consider a beef boot.

Conditions ranged from loose snow over a firm surface at the base to ice over rocks at mid Corkscrew. From Collins mid up, moderately dense snow up to 4 inches deep along the edges of High Main and Mambo was encountered..

In touring mode, I unlatched and freed the middle bale from the buckle rack and slid the rack back into the buckle . The top buckle bale was unclipped and a self securing catch on the strap held the bale and strap in place around the top of the boot. The top buckle rack was also slid back into the buckle frame. The expected buckle fiddle factor never materialized.

Buckling the boot required snugging the upper strap to pull the outer tongue close enough to the shell to facilitate closing the middle buckle. When opening the boot, twist the forefoot buckle 90 degrees or the outer tongue will sit over the buckle when closing the boot. The lower buckle can also be locked in the open position.

The limited skinning/skiing provided these impressions of the boot.
The boot climbed well and I experienced no foot movement.
It was comfortable and warm.
Transitions from ski to hike and back require a little thought but not a deal breaker.
The boot performed well on firm surfaces as well as in soft dense snow at low speeds.
It fits my relatively high volume foot.
The boot is fairly light.

The rating may change.
Age 60
Weight 147
Height 5'6"
Uncorrected Foot Dimensions
Length 28 centimeters
Instep 26 centimeters
Heel 36 centimeters
Ball 111 millimeters
Nonaggressive
Areas most skied; Little and Big Cottonwood Canyons, Mill Creek
Skis and Bindings
K2 Annex 108, 170cm and 177cm, Vipec, Vipec Evo
Elan Ripstick 106, 174 cm , Tecton
Fischer TransAlp 88, 177cm, G3 Ion Lt
Fischer Hannibal 96 176cm, G3 Zed

Last year I purchased a pair of Cosmos III boots 28.5 at (316 mm) for out of bounds skiing and liked them so much I wound up using them in bounds quite often with my touring gear. Looking for a little stiffer flex boot for in bounds, side country and to mate to a narrower "walking around" ski, I considered the S1 Carbon and Carbon Longfiber models. Both models in Size 28.5 (316cm) were tried on and it was determined the shell was too large. A shell size 27.5 (306) was tried and it surprised me that a boot 10 cm shorter was spot on, considering my cosmos are 28.5 (316cm). Once the proper size was on my feet, I found the Carbon too stiff in both ski and tour modes.


Longfiber vs Cosmos III

The Longfiber is quite comfortable and fits a little closer around the foot than the Cosmos. That in mind, the Longfiber liner has not been cooked and the shell is 10 cm shorter than the Cosmos III. 306cm vs 316cm.

The Longfiber buckle fiddle factor is considerably higher when transitioning between ski and tour modes than the Cosmos III. I expect that to be less of an issue as time goes on.

Longfiber cuff range of motion appears to be more than adequate and feels "easier" in tour mode than the Cosmos III.

The Liner feels a little denser than the Cosmos III liner.

Did Scott design a new last for this model?