gossamer

noun.
a gauze fabric with an extremely fine texture
noun.
filaments from a web that was spun by a spider
Synonyms: cobweb
adj.
characterized by unusual lightness and delicacy
this smallest and most ethereal of birds|gossamer shading through his playing
Synonyms: ethereal
adj.
so thin as to transmit light
a hat with a diaphanous veil|filmy wings of a moth|gauzy clouds of dandelion down|gossamer cobwebs|sheer silk stockings|transparent chiffon|vaporous silks