Using these fanny packs is super easy. Just put on the strap and adjust it to fit your waist comfortably. You can use it to carry your small essentials like keys, phone, and wallet when you're out for a walk, running errands, or traveling. When it comes to maintenance, use a soft cloth to wipe off any dirt or dust. Avoid exposing it to harsh chemicals or excessive moisture. And remember, due to the California Proposition 65 warning, be careful not to ingest or have long - term skin contact with the product parts to prevent potential health risks.