How do motion sickness bracelets work

1Pair Anti Nausea Carsickness Seasick Motion Sickness Relief Wristband Bracelet

2 Pcs/Pair Travel Bracelet Adjustable Anti Nausea Wristbands Car Motion Sea Sick Ship Plane

1-5pair Travel Morning Sickness Wrist Band Anti Nausea Car Boat Sea Plane Sports Safety Wristband Anti-motion Sickness Bracelet

Children Adult Travel Motion Sickness Wrist Band Anti Nausea AntiMotion Sickness Bracelet

Car Boat Airplane Travel Motion Sickness Wrist Band Anti Nausea AntiMotion Sickness Bracelet(Orange

Motion Sickness Anti-nausea Bracelet Car Van Airplane Sea Travel Sickness Bracelet Strap~Silver VR22202241