A compression garment is a knit two-way stretch sleeve or stocking that is worn to assist in controlling swelling and to aid in moving lymph fluid from the affected area. It should be worn only while the patient is awake and active and should be custom fitted for each patient. Experts recommend that patients with a history of lymphedema wear correctly fitting compression garments when flying, as changes in cabin pressure may lead to an exacerbation of lymphedema.