We've been testing the Proprius line since last spring and are quite stoked on it. This synthetic puffy is the epitome of the line-light, functional, and no frills. The jacket is an athletic fit with long sleeves and a large helmet compatible hood. One waist draw string, one hood synch, and a single chest pocket are all you get and all you need. The wrist cuffs are larger than most insulation layers, have a more open fit, and include a thumb loop. Tight elastic wrist cuffs that don't fit over gloves and leave the wrists cold were one of my biggest pet peeves in the insulation layer world.
We like this one as a throw over at the summit and on the descent due to its DWR finish and Primaloft Silver Insulation which retains warmth even when wet. Its also a great option under a shell for brutally cold or non active scenarios. This one will stay in my pack year round, and is quickly becoming a favorite piece.
Average Weight: 350 g (12.3 oz)
Body Fabric: 15D x 15D 33 g/m2 100% nylon ripstop with durable water-repellent
Insulation: 60 g PrimaLoft® Silver Insulation Active