Sterile, flow wrapped Ambulance dressings are unmedicated dressings with thicker pad for severe wounds where heavy blood loss occurs. Designed for use by first aiders, paramedics and the emergency services. They have long stretchy bandage attached to the pad so that the dressing can be securely tied, pinned or taped to hold it in place. The No 3 (extra large) dressing has a pad size of 28cm x 20cm is flow wrapped and has the sterile expiry dates clearly marked on the pack.