Very thin material. I have thermos that I bought for $20 and they seem to be better than these. On the other hand they haven't ripped yet and seem to be doing 'something' to retain heat so they're not totally useless, but such a thin fabric nonetheless!
πͺ 3T Boys Training Underwear: Comfortable and Durable Toddler Underwear
41 Review
π Russell Athletic FreshForce Protection: Boost Your Boys' Performance with Assorted Clothing
49 Review
Comfortable & Practical City Threads Underwear: Sensitive-Friendly Boys' Clothing
47 Review
π¦ HLMBB Dinosaur Toddler Underwear Training | Boys' Clothing for Easy Potty Training
44 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review