This jacket is a real gem, its likely the most versatile piece in my closet. In temps of 40 to 50 I can wear it on it's own, anything warmer and this might be too warm. If it gets colder, I can still live with it, but a layer would be necessary. Where I think this jacket really shines is in the windstopper element, its much warmer for its weight than it appears, despite a lack of real insulation as it blocks the wind 100%. This windstopper also creates an insulative property when active, as it will not breathe like the Gamma MX, if extremely active it can be worn in cold temps. The only thing I miss would be a chest pocket, but realize that is an alpine minimalist piece so there arent even adjustable cuffs. Sleeve length is generous, and the fit of the jacket overall is close. I've worn this for any time I am going to be out in the cold temps with wind, and possible light rain.... the DWR and nylon outer fabric work great. The windstopper itself is actually quote waterproof, but the seams are only finished with finishing tape, so its not seam sealed for water. Compared to the Venta SV this is much trimmer jacket fit wise.