Psi Bands (pronounced "Sigh Bands") are drug-free wrist bands for the relief of nausea due to morning sickness (pregnancy), motion sickness/travel, chemotherapy, and anesthesia. Psi Bands fit wrists measuring 5 ¼ inches up to 8 ¼ inches in diameter. Wear two at a time - 1 on each wrist (2 come per package). Scientific studies support the use of wrist acupressure in the relief of nausea due to the above conditions. Breathe a "Psi" of relief!