Navy Blue Silver Happy Birthday Party Decorations Set for Men Boys Women Girls, Banner, Crown Balloon, Fringe Curtains, Cake Topper for 13th 16th 18th 21st 25th 30th 40th 50th 60th 70th Party Supplies

Q: Do you need a helium tank to inflate these balloons?

The mylar balloons should be filled with helium. The rest of the balloons can be blown up without one. Although the confetti balloons are a bit difficult to blow up by mouth since there's a band around d the opening to restrict the opening and prevent confetti from falling out. I'd suggest a handheld balloon pump at the very least.