The phrase "throw on a sweater" is correct and can be used in written English.
For example, you could say: "I'm cold, so I'm going to throw on a sweater before heading outdoors."
Throw on a hat and sunglasses.
I threw on a chunky green sweater ($49) over it, the sort of green you see mainly in stage lighting and food coloring.
My wardrobe tends to be pretty minimalist and monochromatic — black dresses, black sweaters, black boots — so throwing on a pair of zigzag yellow tights, like those at WeLoveColors.com or some polka-dotted or weird checked number (Topshop, Urban Outfitters, and American Apparel are go-to options), helps set an otherwise boring outfit apart.
To catch the plane back to L.A., I threw on a DVF blue and white jumpsuit and gray J. Crew sweater.
Throw on a shawl or sweater.
If the room where you're working is too hot or too cold, you should be prepared to take off some layers or throw on a scarf or a sweater.
Fastening-free, the sweater was easy to throw on after coming ashore wet and tried.
