A customer tries on a mask at the House of Humor costume shop

Mark Greenbaum, owner of House of Humor, talks to a customer at his costume shop in Redwood City, Calif., Thursday, Sept. 18, 2025. (AP Photo/Terry Ch...

Mark Greenbaum, owner of House of Humor, checks on inventory in his costume shop in Redwood City, Calif., Thursday, Sept. 18, 2025. (AP Photo/Terry Ch...

A variety of face masks line the shelves at the House of Humor costume shop in Redwood City, Calif., Thursday, Sept. 18, 2025. (AP Photo/Terry Chea)

Lucas Araujo and Mark Greenbaum work behind the counter at the House of Humor costume shop in Redwood City, Calif., Thursday, Sept. 18, 2025. (AP Phot...

A customer tries on a mask at the House of Humor costume shop in Redwood City, Calif., Thursday, Sept. 18, 2025. (AP Photo/Terry Chea)

Chris Zephro, co-owner of Trick or Treat Studios, shows a mask inside a warehouse in Santa Cruz, Calif., Wednesday, Sept. 10, 2025. (AP Photo/Terry Ch...