A snow suit is considered waterproof if it has a special outer layer designed to repel water and moisture. Our snow suits for kids are made with high-quality waterproof fabrics like polyester or nylon, which prevent snow and rain from soaking through. Many suits also feature taped seams, which further block water from entering through stitching. Some snow suits for boys are treated with durable water-repellent (DWR) coatings, enhancing their ability to keep moisture out. A waterproof snow suit is essential for keeping your child dry and comfortable during winter play, especially in wet, slushy conditions.