Is this bag real leather?

No. The shell is polyurethane, a synthetic material. It looks smooth but will not develop a leather patina and is less abrasion-resistant than leather.

How much does it hold?

It is a small crossbody. Expect a phone, a cardholder, keys and a lipstick; a full-size wallet or water bottle will not fit.

Is the magnetic closure secure?

It snaps shut easily but holds with light force. It is fine for normal wear, but it is not a theft-proof closure in crowded places.

Can the strap be adjusted for crossbody wear?

The bag is built as a crossbody and shoulder bag. Check the strap length on the product page, since a long strap may sit high on taller wearers.

How should I clean the polyurethane?

Wipe with a soft damp cloth and mild soap, then dry. Avoid solvents and store it stuffed and away from direct sun to prevent sticking or cracking.

Is it a good first designer bag?

If the Valentino look matters more than materials, yes. If you want a bag that lasts years of daily use, a leather crossbody from a mid-tier brand is the safer buy.