n. — Outdoors
a light jacket serving as protection from the wind.
A wind shell is a wind-proof jacket intended mostly for sports such as running, hiking, cycling and general outdoor use. Chart 1 shows that the term is most prevalent in South Africa, then Canada, but is used very widely in the English-speaking world.
See COD-2, s.v. "shell" (6), which is marked "N Amer.", and Gage-5, s.v. "wind-shell", which is marked "Cdn", which we cannot confirm with our data.
- 1965  Mother carries baby in fur-trimmed hood of kopletuk, the blanket-cloth parka under her nylon wind-shell 
- 1976  Again there is a wide variety in the price of the layered clothing Margeson suggest suggests as suitable: insulated or string underwear $15-$30 a set, knicker style pants $25-$50, long wollen socks to be worn over the pants $8-$15, light cotton turtleneck sweater $10-$12; medium weight sweater $20-$50; wind shell $15-$65. 
- 1988  Jacket and the tie for man and a dinner dress for women are sufficient for any 'formal' evenings. Of course, the Atlantic calls for a sweater, wind shell, light rain coat and rubber-soled shoes. 
- 1999  Steve Griffiths is strolling up and down the beach on his winter vacation here, soaking up the sun. But to reach his skin, the sun has to travel through a wind shell, a ski jacket, and a wool sweater - not to mention a hat, mittens and hiking boots. 
- 2007  The other night, I sat looking at my wind shell and fleece vest from the Canada Winter Games. 
- 2013  So, what is that gear? For starters, leave your bulky ski jacket in the closet. With your legs churning, you're going to be sweating -- perhaps quite a bit depending on the conditions and the length of your route, so layering your clothing is key. "A wind shell is breathable but wind-proof. You're generating a lot of heat while you're riding the bike," he said. 
Images:
Chart 1: Internet Domain Search, 13 Apr. 2015