The phrase "heavy jacket" is correct and usable in written English.
It can be used to describe a jacket that is thick and provides warmth, typically in cold weather.
Example: "Make sure to wear a heavy jacket when you go outside; it's freezing today."
Alternatives: "thick coat" or "warm jacket".
Wearing a heavy jacket, pumping up his team, waiting, watching.
He came from Florida and he would wear a heavy jacket and flip-flops.
When the wind blows hard and the flags flap violently, you know to reach for a heavy jacket.
He wore snow boots, a heavy jacket and earmuffs that doubled as ear protection from the cracking sound of gunfire.
The costume consists of a full skirt, a heavy jacket, numerous garlands and necklaces, and a towering headdress.
Social cues help us figure out where to park, for example, or whether we need to wear a heavy jacket today.
Other garments, such as fleece jackets, have open-ended plastic zips, while leather or heavy jackets usually have metal zips.
When first seen, its two characters are wearing things like sweaters, knitted caps and heavy jackets and appear to be really cold, even though they're indoors.
They wore wool hats and heavy jackets, carried blankets and water bottles -- all necessary for a long journey into the Sahara, where nighttime temperatures drop to near-freezing this time of the year.
I'd heard about winter and seen it on TV but I had no idea how cold it was going to be". At their final destination, Syracuse, N.Y., Michael's foster mother was waiting at the airport with open arms and "with heavy, heavy jackets.
Heavy jackets and layered clothing — including one man's sweater beneath his flowing dishdasha robe — pointed to the killings having occurred in the early days of the uprising, in March 1991, when there was still winter weather in this part of Iraq, they said.
