While not the lightest or warmest insulating layer on the market, the Redpoint Optimus from The North Face shines as an extremely versatile piece. It provides the perfect amount of insulation for those stop and go activities when layered over or under your hardshell/softshell. The Primaloft fill compresses nicely and the quilts in the torso area keep it where it was intended to be after multiple stuffings into the pack. The sample I received has accompanied me on numerous “worker turn” runs in “the park” (GTNP) and on “the pass” (Teton) this past winter. I love how it is “low bulk” and rather trim fitting, a great layering piece.