1. Anti-impact bottle sleeve - double layers premium thick bubble bags padding provide enclosure for extra cushion, as well as their tough, sturdy, thick vinyl(pvc) exterior wrap to prevent breakage in transit shipping .no worries. let your wine fly like an angel! 2. Triple seal leakproof - double ziplock and velcro seal to keep bag air tight and luggage safe from bottle breakage. if a bottle is accidentally crushed by a violent impact, liquid will not leak out of the bag and mess up your luggage. 3. Reusable & easy to use - these durable bottle travel sleeve protector bags can be used repeatedly in luggage for cars, planes, cruises.it's simple and easy to use with wine, beer, champagne, spirits, liquor, olive oil, perfumes and other fragile glass bottles. let safety travel with you.