Happy Halloween All of those may have rubbery smell after prolonged storage. Please do not mind This will not cause any harm. It s better to be aired out before use and inflate with pump stay away from your face and lips. Note: Large size foil balloons and latex balloons could float with helium. Mini size balloons could not float even with helium. We advise our customers to fill the air and support balloons with sticks or stand because helium is very expensive and doesn t last very long usually less than 12 hours. Filling with air can last for days or longer. This is the property of all balloons. WHAT YOU GET:as shown This Banner will create a cheerful atmosphere for your birthday party and highlight your gathering your family and friends will love it Welcome to ! Halloween balloon set is a cute decoration idea for halloween party. Our balloons have a classic Halloween pattern and is child-friendly. The scary night brings a lot of fun and makes the little Halloween fans feel happy. halloween decoration for party Halloween Decoration Package: Notice: 1. Manual measurement please allow 1-2cm error. 2. Due to different monitors the same picture maybe displayed in different colors.