Sheep's-wool

(Zool.) the highest grade of Florida commercial sponges (Spongia equina, variety gossypina).

See also: Sheep

References in periodicals archive ?
Thermafleece is the first sheep's-wool insulation to gain this certificate, which means that after exhaustive tests the BBA has officially certified that the product complies fully with the requirements of building regulations for roof and timber-framed wall insulation.
Sheep's-wool insulation overcomes these problems and has the added advantage of maintaining its thermal properties when wet and has excellent fire-resistant properties.