Magic Arch balloons are made of Foil/Mylar and can be deflated and inflated over and over again.
BalloonFast.com also Sells the ACKIT2 which is a re-useable arch frame that can last for years and years.
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WARNING: CHOKING HAZARD - Children under 8 years can choke or suffocate on uninflated or broken balloons. Adult supervision required. Keep uninflated balloons from children. Discard broken balloons at once.