Arc'teryx Alpha IS vs Rab Kinetic 2.0

This jacket is excellent for its weight and thickness. It's not puffy nor thick with down, but it performs well above many of my heavier jackets. It's very comfortable, and not at all restrictive. It definitely feels like it's made to be worn over another jacket or some other insulation

But for $500, it’s definitely a souped-up option: The design is decidedly fashionable (as we’ve come to expect from Sweden-based Fjallraven), considerably more durable with a 60-denier polyester fabric, and heavier at 1 pound 0.6 ounces. Notably, the Eco-Shell also proved to be a lot more waterproof throughout our testing (Fjallraven gives it a 30K waterproof rating, which towers over the Rab's 10K rating). In the end, the lightweight and streamlined Rab is a better option for weight-conscious alpine climbers looking for a decently waterproof hybrid, but we’re big fans of the Fjallraven for shoulder-season hiking, skiing, and around-town use