I couldn't stand the smell. After blowing them up my mouth have weir taste and even my hands smell terrible.I would not buy these again. They came double vacuumed wrapped and now I know why!! They smelled like a mixture of gas fumes and paint fumes. I could not tell what the smell was but it was so strong that I threw them away outside. It was not the normal latex smell. I blew 1 up just to see how they would be but the smell was so bad that I immediately popped it and tossed it. We had a 30th birthday party at a restaurant and there is no way they would’ve let us keep those balloons inside. Very disappointed!Sorry I can’t recommend this assortment. If all you need are white and gold they’re fine but almost every single black balloon burst on its own. All were inflated to the same size (not overinflated). Over a period of 2-3 hours, all but three of the black ones had popped - none of the others. Obviously a problem with that color from this vendor.Perfect giftBalloons are orange, not gold. Disappointed considering my other decorations are gold. Not even going to inflate and waste the heliumExactly as expected. We blew them up with a balloon pump so can't comment their use with helium. They were blown up on 21-23 Nov. It's now 12 Jan and several are still going. (Lots were deliberately popped). I would happily buy again.Good product all round, balloons stayed inflated for 2 weeks. I didn't have a balloon pump so just blew them myself, have to say the taste of these is vile so get a balloon pump. Personally, I feel these were really good value for money and I would order these again