Most styles use either zip closures or clasp closures, depending on the design. Check the individual product listing for the exact closure on each model.
Yes — some styles include RFID-blocking pockets or card slots and locking main compartments. A few listings also note slash-resistant or adjustable straps intended for added travel security.
The common care guidance across several listings is to spot clean or wipe clean as needed.
Some clutches include detachable or adjustable chain or shoulder straps so they can be carried by hand or worn crossbody for hands-free use.