Do you have a history of motion sickness? I have no recommendation for the wrist bands. If you ask a pharmacist - they will tell you it works on a placebo effect. Some cruisers swear by them but would they have been ill without it???? If you are prone there are several good products, discuss your options with your health care provider. A costly cruise is no place to "wait and see". It is also a MYTH that Alaska sailings are "smooth as glass", definately not true.