fastenedcap
nounUK /ˈfɑːsəndkæp/
US /ˈfæsəndkæp/
A cap that is attached so it will not come off.
He wore a fastenedcap so the wind could not blow it away.
OTHER MEANINGS
2. A small lid that is joined to a bottle so it stays with it.
The bottle had a fastenedcap, so the lid never got lost.
3. A cover that is tied or locked in place.
The jar's fastenedcap kept the cookies fresh.
4. A hat held on with a strap under the chin.
The baby's fastenedcap stayed on during the stroller ride.