The boot is incredibly light weight. This boot design clearly takes from the very popular Phantom 6000, which is arguably the most agile climbing double boot there is.



TNF version is just as light as its Scarpa competition, It has a quick lacing inner boot that cinches with a pull of the strings and releases with a pull of the buckle. The outer boot needs to be tied. I added a simple cinch to make it just as fast as the inner boot.



The outer gaiter has a tight rubber sealed zipper similar to the Scarpa, but it is not TZip brand, and the decision to go with an off brand zipper will show



The fabric of the outter gaiter is incredibly thin, it is not advertised or marked as water proof. yet the inside each seam is carefully waterproof taped.



The insides of the ankles are made of slash resistant super fabric like 8000m boots.



The midsole is pure foam, similar to the Spantik. This decreases weight and increases insulation at the cost of durability.



The front and rear crampon welts are strong plastic.



Looking inside the boot the Inner bootie is pretty thin, about 1/4 inch thick wicking fabric and primaloft on the inside. It is nylon on the outside. It is most certainly not heat moldable foam like the Brauntse. There is supposedly Aerogel in addition to primaloft in the toe and underfoot. The insole is open cell foam, and absorbs sweat. This inner bootie is much more breathable, yet at the same time the insulation chosen can be affected by moisture, and implies the need to wear a VBL sock with it.



Under the Bootie is an visible carbonfiber shank plate from heel to toe.



The boot flexes slightly, I would almost consider it a semi flexible boot design class B2. It accepted BD crampons fine, and seemed to kick into ice just fine.



Pros:

Walks well, easy to lace, climbs ice well, good sensitivity to climb rock.

Inner boot dries faster because it is breathable. More affordable than Phantom 6k or Spantik. I'd say I felt comfortable climbing 14k ft in winter, and camping at similar altitudes in winter. Never took it higher than that.



Cons:

Zipper jammed right out of the box. Pulled on it and it stripped a few teeth out. I lubed the zipper with mineral oil. Solved the problem. This sort of boot should come with lube like the Scarpa 6ks.

Bootie is too thin compared to Spantik or Baruntse boots for me to consider Denali or similar cold weather climbing even with an over boot attached.

The super-fabric is especially thin, and after one misstep a crampon put a small hole into mine.



The lacing system did not cinch the foot securely, and descending on dirt, caused my feet to swim around and get nail banging and blisters. I could not figure out how to lace them better to prevent this. Major bummer.



Fits small. I would size up, but they do not carry the 48 or 49 size for me.