tight-fitting cover
nounUK /ˌtaɪt ˈfɪtɪŋ ˈkʌvə/
US /ˌtaɪt ˈfɪtɪŋ ˈkʌvər/
A cover that fits very closely and snugly around something.
The sofa has a tight-fitting cover that stays smooth and neat.
OTHER MEANINGS
2. A protective casing made to hug an object closely so it does not slip.
She put a tight-fitting cover on her phone to keep it safe.
3. A book jacket shaped to wrap the pages closely.
The library added a tight-fitting cover to protect the old novel.
4. A close-fitting fabric layer over furniture or a mattress.
A tight-fitting cover keeps the mattress clean and tidy.