My son is 5 years old, weighs 52 pounds, wears a size 5 or 6 when dressed, I ordered size S, it fits him perfectly. Michigan is warm enough to last from late winter to early spring. It's not waterproof, but that's not a problem. If you like to layer or wear sweatshirts, you can order one size larger.
Insulated Spruce Jacket for Boys by Arctix
62 Review
Red SOLOCOTE Windproof Outwear for Boys Ages 7-8 - Heavyweight SW18018
54 Review
π Shop the Best: Amazon Essentials Toddler Full Zip High Pile Boys' Clothing
52 Review
HAPIU Toddler Waterproof Coverall Original Boys' Clothing in Jackets & Coats
60 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review