Just in for review is the lightweight Xenon Pull-On (half-zip, goes over your head) from UK company Rab.
Made with a Pertex Quantum shell material which is super-thin at 20D, it’s like a lightweight, technical sleeping bag.
Filled with 60g Primaloft ONE synthetic down, it will insulate and breathe, and not go all pathetic and useless if it gets wet.
The fit is slim/athletic and hugs close to the body. Pockets are warm and deep, for cold hands. A waist drawstring, moderately high neck and elasticated cuffs seal out breezes.
We’ll be reviewing it soon.