The Jazzy Thin Brim Ivy Hat MATERIAL: 100% Nylon SIZE INFORMATION: Ivy hats are available in two different sizes, S/M and L/XL. LIGHTWEIGHT & Cozy enough to keep your head warm in winter. TRADITIONAL, classic & vintage style newsboy hat. VERSATILE design transitions easily from day to evening. HOW TO WASH YOUR IVY HAT: 1-Cool to warm water 2-Mild detergent 3-Gentle rubbing with a clean washcloth 4-Rinse in cool water.