Water flannel : A floating mass formed in pools by the entangled filaments of a European fresh-water alga (Cladophora crispata).

Example:


Taxonomy
milly, high water, flannel trousers, flannel pants, flannel, slant, pockets, Shop.

Defination from the web:
water flannel trousers at Bloomingdale's - like no other store in the world. Milly lends these flannel pants a touch of the unexpected in a...