Men vest size chart:order a size up would be recommend S: bust 82-88cm, length 54cm, suitable for height 163-168cm, suitable for weight 50-58kg M: bust 86-92cm, length 56cm, suitable for height 168-173cm, suitable for weight 56-65kg L: bust 90-98cm, length 58cm, suitable for height 173-178cm, suitable for weight 64-71kg XL: bust 94-102cm, length 60cm, suitable for height 178-183cm, suitable for weight 70-78kg XXL: bust 98-108cm, length 62cm, suitable for height 183-188cm, suitable for weight 77-86kg MATERIAL: This wetsuit vest is made of 3mm premium neoprene and eco-friendly nylon, keep you warm and allows you to move flexibly in cold water. FRONT ZIPPER DESIGN: Heavy Duty front zipper can will provide years of trouble free use. The inner neoprene cloth behind the zipper effectively lessen water and sand penetration. APPLICATION: Wear the neoprene vest alone to prolong your dives in tropical waters or pair it up with a fullsuit to increase core warmtn in more temperate waters. Perfect for surfing ,diving ,paddle sports , windsurfing, lake activties and other water activities. FLATLOCK STITCHED:The flatlock seams provide a smooth interior and exterior surface to ensure your maximum comfort and durability. CHOOSE THE RIGHT SIZE: Please refer to the size chart befer you choose the right size.If you can not make sure which size is suit for you,please contact us to get a recommendation.