Flywire

He noticed for the first time that the fellow was naked. He had taken little notice of him in the darkened room, and afterwards had seen him only through the fly-wire door.

For a moment, she feared he would, like a new puppy, burst through the flywire.

He stood in the deep shadow of the open doorway, holding the flywire back with one hand and watching them get out and stretch their limbs in the sun.