100% Cotton COMFORTABLE & DURABLE ? Made of breathable 65% cotton & 35% polyester, our baseball caps provide a relaxed everyday fit. With a thick stitch on the crown and visor, they won?t easily lose shape. EVERDAY ACCESSORY ? Make our hat your daily wear. It?s great for a bad hair day, a sunny morning or when enjoying outdoor activities like ball games, jogging, aerobics, dog walking, and cycling. HIGH PONYTAIL HOLE DESIGN?Our ponytail cap is designed with a ponytail hole on the Back brain spoon of the cap, which is perfect for pulling your messy bun or high ponytail. No matter if your hair is thick, thin, curly, wavy, straight, coarse or fine if you wear it up and wear cap, our ponytail caps are for you! Also looks great with braids, sock buns, and other up-dos MEDIUM SIZE: Best fits for 55-58CM 21.6-22.8 7 7/8-7 1/4 with adjustment belt. MEDIUM SIZE: Best fits for 55-58CM 21.6-22.8 7 7/8-7 1/4 with adjustment belt.