The transparent plastic skis belonged to Mr. Greenway. He used them in his Snow Ghost disguise, which made it look like he could fly while used in the snow.
Scooby-Doo, Where Are You!
After Mr. Greenway and his partner, Mr. Leech, had been captured, Scooby-Doo demonstrated them for the Sheriff. He got off to a good start, before crashing into a tree, and disturbing a squirrel.
- Velma Dinkley pointed out how effective the skis were at fooling people at night, but it was effective at all times.