The 60 gram insulation piece - Rab Xenon X Hoodie - Mens

this jacket hits all the technical specs you want out of a 60g synthetic insulation piece. it is perfect year round. summer through fall it can function as a belay jacket. winter its perfect layering piece in the arsenal. the pertex blocks wind and precip, and the jacket dries out very quickly. packs down small to nalgene or smaller type size, weighing only a couple ounces more than the 300 dollar new patagonia micropuff, and burlier material as well.

only limitation is that this jacket does not breathe very well - which is the point - it blocks wind and rain, and holds in heat. if it is cold enough for me to be wearing this jacket while moving, i'm most likely moving pretty slow, or it is really cold, or both most likely. example would be approaching an alpine ice climb - approaching in base layer and wind shirt. base of climb, strip wet layer, throw on fresh layers and this coat. if really cold and or seconding a climb ie not working super hard, i'll keep this on. if leading, or hard climbing,take it off and pack it down and clip to harness or in pack..