Thank you for looking. This is an inner vest for a wetsuit. It is a used but brand-new 2mm easy-dry neck inner vest. By wearing this, you can turn your existing wetsuit into a semi-dry suit with this new layered marine style. The 2mm thick, back-surface skin vest, like a wetsuit, enhances warmth and prevents the unpleasant chilling sensation caused by water entering from the neck and back. Additionally, the easy-dry neck, designed to be tucked in like a drysuit, significantly improves waterproofing around the neck. ■Material: Surface/Giga Flex, Back/Flat Skin ■Features: ・Easy-dry neck for drysuit-like waterproofing. ・Back flat skin specification that adheres to the body to enhance warmth. ・Super stretch around the neck to reduce pressure. ・Side velcro for easy on and off. ・Long length to prevent shifting inside the suit even during movement.