The Neon snapback hat by Yupoong has a classic 6 panel design that features fan adjustable plastic strap on the back, a flat brim and a full crown profile. The button on the top of the hat is the same color as the hat itself, and so is the stitching. Materials: The Yupoong snapback is made from 80% Acrylic / 20% Wool. It has a bit of a heavier feel to the material, It breathes extremely well and is machine washable. Size & Fit: The Yupoong snapback is fully adjustable up to 24 ¼ inches, which means it fits most head sizes.