Barely troubling the scales at 270g for a size large, the Delirious is the lightest waterproof jacket here by some margin. Sweet have done this by paring away any features that aren't strictly necessary; that means no hood, no comfy linings and only one small phone sized chest pocket.
We are big fans of this approach to waterproof jackets, keeping breathability to a maximum by removing barriers like pockets, excess stitching and taping to aid moisture transmission, reduce weight and pack size. In this case, however, we feel the Delirious has taken austerity a little far - they could have done with just an occasional nod to comfort here and there. For example a thin microfleece lining in the otherwise excellent, high collar would stop it feeling quite so harsh and cheerless when zipped up to our chin in bad weather.
Otherwise we like the adjustable hem, cuffs and collar for regulating airflow through the jacket when on the move and the Gore-Tex Active fabric is one of the best out there for breathability and protection. Especially when working hard the reduction of clamminess over lesser fabrics is very noticeable, so we are big fans.
Little touches like asymmetric cuffs overhanging the back of the hand and waterproof zips mark this out as a premium lightweight and durable jacket, but it does come at a hefty price for what you get.
