Love it! My new Quicksilver Cypher Fuse Flex 4/3 wetsuit is extremely flexible & super warm. Used it lat week in Jersey in 48 degree F water. I was able to outlast most other surfers because they got cold. I lasted about 3 hours & didn''t get cold. I expect this suit will likely suffice up to 45 degree water temps. Conversly- the chest zip is a little tricky to put on/ take-off around the the shoulder area (kind of tight). I suspect it takes some getting used to. I hope to it will get easier over time.