Our 12″ metallic-pearlised latex balloons are made from natural rubber latex and are completely biodegradable. They take approximately 6 months to breakdown, which is the same time as an oak leaf. These balloons have a lovely shimmer / shine to them to give your event that extra sparkle. 12″ latex balloons have an average float time of 6 to 8 hours in standard room conditions. When inflating with helium we recommend that you inflate your balloons as close to the event start time as possible. All our latex balloons are suitable for helium or air inflation.