While Our Air-filled Stands Are Much Sturdier Than Helium Balloons, Latex Balloons Can Oxidize (turn Matte/cloudy) Or Pop If Left In Direct, Hot Sunlight Or Placed On Sharp Grass. If You Are Hosting An Outdoor Party, We Highly Recommend Keeping The Bunny On A Smooth Surface In A Fully Shaded Area, Like Under A Tent Or Patio Cover.