The most breathable waterproof fabric we’ve ever tested is available in this very simple and functional design – a full-zip hooded jacket with a two-way zipper that allows for venting by zipping up from the bottom zipper as needed.

It’s purpose-built for trail runners who layer it over a thin base layer, so if your aim is to use this jacket for backpacking, and would like to layer it over a mid-layer, size up one size.