4mm wetsuits are a great option for the shoulder seasons (Spring/Autumn). For those times when it's a little too cold for your summer option but you are not quite ready for the warmth of a full blown winter wetsuit. With modern wetsuit technology hardy South West (UK) surfers can be comfortable in one of these right through the winter. Need advice? Drop us a line, With years of expertise we are confident that we can help you find the right wetsuit. Free UK delivery and returns* here at magicseaweed.