mattia_v
Contributor
Update: bought the W3. Testing it (and the BP/W and new reg set) in the pool tomorrow. Will buy the vest at a later point, although my girlfriend decided the extra 3mm underlayer would be worth it right now.
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3mm with a good hooded vest. If it is cold enough for a 5mm, it is cold enough for a hood, and if it is cold enough for a hood, it is most certainly cold enough for a hooded vest. Get a W3 and a U1. Purchase at the same time to make sure the U1 will go under the W3, shouldn't be an issue as it is only 3mm.