This boys ski suit is specially designed for winter outdoor sports, featuring advanced waterproof technical fabric with lotus leaf effect treatment that causes water droplets to roll off without penetration. The thick fleece inner layer is soft and skin-friendly, effectively locking in body heat to keep children dry and warm in snowy environments. The detachable design is a standout feature - the outer windproof and waterproof shell can be worn separately, while the warm inner layer can also be used independently, meeting wearing needs during spring and autumn seasons. Durable material withstands active children's play, with reinforced treatment at elbows, knees and other vulnerable areas. The parent-child matching concept ensures coordinated family outings, with adult sizes using the same craftsmanship and materials to guarantee professional protection for the whole family. Multiple sizes are precisely divided according to children's height characteristics, providing comfortable fit without restricting movement. Suitable for various outdoor scenarios including skiing, mountain climbing, hiking, and camping, making it an ideal choice for winter family outdoor activities. Thoughtful details include reflective strips for nighttime safety and multiple storage pockets for convenient carrying of small items.