This is a children's snow wear (ski wear) from Columbia. It's likely the same model as the current Double Flake II Set. I purchased it on Mercari about 4 years ago, and my eldest and second daughters used it for 4 seasons, so it's probably an older model. XXS. According to the official website, the size is listed as 110cm (105-120). My daughter, who is currently 118cm tall, is just about to outgrow it. I bought it used, and it was used 3-4 times each season for sledding at the ski resort, so there are stains and drag marks on the cuffs and hems. Regarding waterproof performance, it hasn't leaked, so it should be usable. Please purchase only if you understand the condition. Size...110cm