The lightest material ever, less dense than helium

What is it called?

if it's less dense than helium, it floats upward due to it being far less dense than air.

Fuck up its lighter than helium it wont be a solid

Aerogel is a synthetic porous ultralight material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The result is a solid with extremely low density and low thermal conductivity. Nicknames include frozen smoke,solid smoke, solid air, or blue smoke owing to its translucent nature and the way light scatters in the material. It feels like fragile expanded polystyrene (Styrofoam) to the touch. Aerogels can be made from a variety of chemical compounds.

yeah its not less dense the helium but still very light