self-fastening
adjectiveUK /ˌself ˈfɑːsənɪŋ/
US /ˌself ˈfæsənɪŋ/
Something self-fastening closes or sticks together by itself without any help.
My new shoes have self-fastening straps instead of laces.
OTHER MEANINGS
2. Able to attach or secure itself automatically, as a device or part.
The self-fastening clip snapped shut on its own.
3. Describing a material that sticks to itself when pressed.
The self-fastening wrap held the bandage in place.
4. Closing without buttons, laces, or outside help.
The bag has a self-fastening top that seals tight.