No matter the occasion, these party balloons will look amazing! Use them on their own or add them to a display! Balloons are a laurel green colour. They look darker when not inflated but lighten once filled. Standard plain finish with a semi-transparent base. Latex balloons measure 45cm in diameter. Helium quality. Latex Balloon Tips: Latex balloons are made of natural rubber, meaning they are 100% bio-degradable and will break down over time. Due to being made from natural rubber latex - anyone with latex allergies should not handle balloons directly. Helium filled latex balloons may not float as long as foil balloons - as latex is a porous material, helium escapes latex quicker. Can be filled with air, however best filled with helium you are if wanting to float. Using Hi-Float in latex balloons will extend the float time. 45cm helium-filled balloons will float for 12-18 hours. If Hi-Float is added, float time is 4-5 days.