sheath

Example:She pulled out her cellphone from its case before heading out.

Definition:an enclosed space or container, often with a cover or lid, designed to protect or hold something.

Example:The thick covering of snow kept the hikers warm.

Definition:an object or layer that covers something, providing protection or concealment.

Example:He opened the cover on the checkbook to see the balance.

Definition:something that conceals, protects, or encloses an object or area.