close-fitting cover
nounUK /ˌkləʊsˈfɪtɪŋ ˈkʌvə/
US /ˌkloʊsˈfɪtɪŋ ˈkʌvər/
A cover that fits tightly around something.
The phone has a close-fitting cover that keeps dust out.
OTHER MEANINGS
2. A protective layer that hugs the shape of an object.
The close-fitting cover on the cushion keeps it clean.
3. A book jacket shaped exactly to the book.
She added a close-fitting cover to protect the paperback.
4. A lid or casing that seals tightly.
The jar's close-fitting cover keeps the cookies fresh.