Agree with the point about the feet. I get cold feet anyway so doubly important for me. I just use ordinary walking boots, but I wear a pair of
Thaw Silk Sock liners (brilliant) plus a pair of extreme ski socks, and my feet are lovely and warm - plus they don't get too sweaty as both socks provide good wicking and the boots are breathable.
Jamie, if your layers aren't working then you are using the wrong layers! I use a winter sports style layered approach, and I fished all day in temperatures as low as -8.
Base Layers:
1. An ultra-thin
Thaw silk layer (vest and longjohns)
2.
Icebreaker 260-rated vest and longjohns.
Mid Layer:
Up to three good-quality fleece tops. Fleece is warm, breathable, light and thin - which means you can wear several without becoming a michelin man, though my third one is a size up.
Top layers(s):
1. Wind-proof fleece jacket — wind-proofing is essential!
2. Preston Dryfish500 jacket and salopettes — waterproof and breathable.
Head: A decent thermal hat. A baseball cap just won't keep you warm!
Sounds complicated but it works for me. If it's -5 at dawn but the sun comes out later, I can strip off layer-by-layer as needed (not all the way, obviously
). I usually take a two or three layers off for the walk down so I don't get too hot, and put them back on in the swim.
As Anthony said, sweat is the body's cooling method. If you get damp from sweating, you are guaranteed to get cold, so your base and mid layers need to have good wicking properties and everything needs to be breathable.
Hope this helps.