These adult short brown 'Groovy Guy' Beatles Mop costume wigs are a great accessory for 100s of costume themes from John Lennon and the rest of the Beatles, to modern day grunge kids - and great for anyone who just wants to have more fun. These are 100% synthetic wigs, can be washed, and can be worn without a wig cap, although wig caps may help depending on how much hair you have.