He's loose fitting enough to wear a sweatshirt underneath (he lives in sweatshirts!) and has enough arm movement to actually wear one. He says it's warm and comfortable. Initially he had problems with the zipper - it got caught inside the valve, but he learned to use it without problems.
Insulated Spruce Jacket for Boys by Arctix
62 Review
π§₯ JAN JUL Boys' Waterproof Fleece Lined Cozy Dry Clothing, Jackets, and Coats
58 Review
π Shop the Best: Amazon Essentials Toddler Full Zip High Pile Boys' Clothing
52 Review
Adorable Arctix Kids' Dancing Bear Snow Suit Keeps Your Little One Warm and Stylish on the Slopes
56 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review
π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review