This yellow Klättermusen Ansur windproof gilet has been made with a lightweight technical organic cotton. Designed to be waterproof with a crew neck, this vest is slim fit and has a front zip fastening, chest logo detailing, a reflector, reinforced seams, a ventilated gear mesh rear pocket and buttoned pockets to the side. We don't have the Ansur to everything. But to the question of which extra layer to wear on a trek? It's got to be this Klättermusen gilet.