light as a feather
Extremely lightweight. This simile can be used to refer either to physical weight, as in This load is light as a feather, or to texture, as in This cake is light as a feather. [Mid-1500s]
Extremely lightweight. This simile can be used to refer either to physical weight, as in This load is light as a feather, or to texture, as in This cake is light as a feather. [Mid-1500s]