For the uninitiated, Mummers is recommended for adults 16 and older because of its bawdy humor. For first-timers, heed these tips: The Mummers crew recommends that people wear comfortable, casual clothes and sneakers but no jewelry. The popcorn can rise as high as your ankles after all is said and done. Plus, with the oil and salt, you wouldn’t want to wear your best shirts and pants.