Although it is a lightweight jacket it is comfortably warm and also reasonably windproof. I have not yet had the opportunity to test it's waterproofedness(?)/ waterproofiicity(?), I haven't worn it in the rain yet.
Excellent value for money at 50 quid. Summer jacket that is very smart. Looks well with jeans or slacks. Water proof aspect is a handy feature for summer drizzle. Good fit - medium is accurate. All in all very pleased.