I tend to wear waterproof sallopettes and a smock,windproof and waterproof,wear a few layers underneath and you dont really feel the cold,plus they tend not to restrict your movement,when casting etc,some of the lads wear flotation suit which will keep you very warm,might pay to go into your local tackle shop and have a look at what is on offer,you should be able to get fully kitted out for less than 100 quid