My favorite jacket - Rab Xenon X Hoodie - Mens

This is easily the warmest and lightest jacket I've ever owned. I've used it since last year to commute by bicycle in cold weather and sit on cold trains for 45 minutes at a time. This jacket keeps me so warm, it's almost like it has an internal heater. The quality is excellent and after months of use there are no signs of deterioration. The jacket also keep me perfectly dry when it rains during my 20 minute bike commute, and dries out quickly when I hang it up on the train. It packs down into a small ball that I can shove into my backpack quickly and easily. I also like that it's a synthetic because I like the idea of moving away from animal product use and also not getting feathers everywhere. I honestly can't think of any cons.