It's either a mid layer or single layer for my usage and both ways are great. I have this Xenolith over my Yushu LS Zip for greater warmth and works just fine. However for single layer, I felt a bit itchy for my skin, but perhaps it just for me. The loops is a killer feature for me! Overall is a very good product and I have stressed this several times, I like the idea of buying this product due to its support to the local Himalayan nomads. Great job, Kora.

Awesome site,quality product.

This top is a good single layer but I prefer it as a mid- layer. The fit is comfortable for movement and the long zip is ace for venting or sealing warmth in. The thumb loops provide extra comfort in cool weather but cover a bit much of my palm to use if active without gloves. To be nit picky the back length is slightly short if like me you are shaped short legged and long backed. The fabric is quite soft which is why I use as a mid-layer to prevent friction wear. This is my new 3 season go to piece of kit. Well done Kora.

M's Xenolith Sweater 2.0

The short version- awesome. Everything Kora claims is true. It’s magically warm and the moisture management is superb. I spent two hours XC skiing today in 15 F with light wind and light snow and wore a Shola and the Xenolith and a Yushu hat. I have a ton of merino (which I love) and can feel the difference in the wicking performance.

My only concern about the Xenolith is that the use of Polartec (non wool) may be a source of stink. No issues after three weeks.

Overall- fantastic sweater. Highly recommend.