This fabric is more like 100% acrylic. There is no tag on the inside of the shirt saying what the fabric is, but it is definitely NOT cotton so not suitable for a tie-dye project. I wouldn't put that on my children.
HILEELANG Boy Girl Polar Fleece Jacket: Warm Hoodie Sweatshirt for Little Kids & Toddlers - Full-Zip Outerwear Coat
45 Review
Comfortable Amazon Essentials Disney Sweatshirt Hoodies for Boys: A Must-Have in Boys' Clothing Collection
65 Review
Stylish Toddler Excavator Crewneck Sweatshirt: Boys' Fashion Hoodies & Sweatshirts
38 Review
Boys' Fleece Crew-Neck Sweatshirts by Amazon Essentials
41 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review
π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 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