Definitely not cotton. I bought a white kit for my daughter to dye her tie. The paint didn't stick to the sock and washed out immediately after rinsing. This is an image of toddler socks and 74% cotton socks dyed the same colors in the same batch. Don't buy them to dye a tie or if you need cotton. According to the packaging, they are made of 60% cotton, but they are not.
Boys' Gold Toe Ultra 𧦠Tec Back Stripe Crew Socks, 5-Pack
46 Review
Jefferies Socks Boys Seamless Toe Crew Athletic Socks 6-pack
47 Review
Aminson Grip Ankle Socks: Non-Skid Slipper Crew Socks for Kids Boys and Girls - 6/12 Pairs
49 Review
π Premium Prince Athletic Socks - Active Black Boys' Clothing for Top-performance
45 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 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