Balloons are made of latex in large format, so they offer good coverage in the arena or the stadium.The balloons are matte opaque and impress with their strong color strength and are filled with air or helium.The ideal article to color accents For an evening event or inside the arena at the concert or a sporting event, you can also use our LED balloons, which impress with their strong luminosity, as the LED light fully illuminates the balloon and lasts up to 48 hours due to battery operation.