It's insanely warm. My 3 year old goes to a forest school, we live in Kentucky so it's not terribly cold but the temp drops to 10(F) and his teachers actually asked me to stop wearing this shirt at all because he was crying he was hot and sweaty in 15 degrees and 5 inches of snow π . So far it's holding up great. Runs a little small, or maybe very true to size, other than that it should work with the base layer. It fits him well now, but I factored in room for growth and not a lot of extra space.
Kid Nation Kids' Tagless Long Sleeve V π Neck T-Shirts 4-12 Years - 2 Packs and 3 Packs
45 Review
Van Heusen Sleeve Dress Poplin
42 Review
Boys' Long-Sleeve Disney Star Wars Marvel T-Shirts by Spotted Zebra
46 Review
The Good Day Lab Clean Shield: Ultimate Comfort and Breathability in Tagless 4-Way Stretch Polo
43 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review