The sky was brilliant with swift-speeding clouds of fleecy white.
I am told Mount Washington is veiled in their fleecy mantles for weeks sometimes.
It was a sunny morning, with a soft blue sky and fleecy clouds.
The deep blue of the overarching skies were embroidered, as it were, with fleecy clouds.
The sun was shining in a sky flecked with soft, fleecy clouds.