You can keep it on even while you bathe as these are waterproof. Quantity advertised is for 4 bracelets. Adult Approximate Size: 202mm 12mm(8" 0.5"). You can even keep a spare one in your pocket or bag.
4 Pack Asthma Asthmatic Medical Alert Bracelet Survival Silicone Awareness Adult
(4 Pack) COPD Medical Alert Wristband Chronic Obstructive Pulmonary Disease
4 Pack Diabetes Medical Alert Wristbands Type 1 Diabetic Insulin Dependent Band
4 Pack Kids Medical Alert Peanut Allergy Silicone Bracelets Awareness Wristbands
HWDNQGH Oxygen Storage Rack，Oxygen Tank Holder Gas Cylinder Wall Mount Bracket, 2/3/4 Pack Safety Medical Oxygen Tank Storage Rack for 40 L, Metal Steel Single Fixed Shelf for Nitrogen Tank(2pcs)
ASerZenith Oxygen Storage Rack,Oxygen Tank Holder Gas Cylinder Wall Mount Bracket, 2/3/4 Pack Safety Medical Oxygen Tank Storage Rack For 40 L, Metal Steel Single Fixed Shelf For Ni(Blue-4Pcs)
