Adult sizes are one size fits most. 100% polyester on front and 100% nylon mesh on the back with adjustable snap back. 

Youth sizes fit ages 2-12 years old, 100% polyester on front and 100% nylon mesh on the back with adjustable snap back.

Hey Moms, Yo'Pops! What's up Shorty! Throwback term that only the cool kids used.