I ripped my semi-dry suit while surfing and bought a cheap suit online to use in the meantime while I wait for my custom order. The description said it was 5mm x 3mm with a brushed lining for excellent warmth. I went in the water only once, and frankly, it's not very good as a semi-dry suit. There's no brushed lining on the arms or below the knees. Water also gets in from the neck, so I can't recommend it for winter surfing. While it's not suitable as a semi-dry suit for winter, I think it's good value for money if you use it as a full suit from spring to summer, and from autumn when the temperature starts to drop. I've only used it once, and it's been thoroughly rinsed in fresh water, so it's almost like new. The size is M, and it's listed as suitable for people 165-172cm tall, but I think it would fit someone around 160cm to 165cm tall and weighing about 60kg. I bought it for 13,500 yen, so I'm listing it for 10,000 yen for now, but I'm open to price negotiations.