Your pieces will arrive in a That's Right, Ratso
recyclable box with a polishing cloth to keep them looking good.
To clean, warm water, a little soap and a soft toothbrush or cloth will do the trick.
Leather should be kept away from water, liquid and chemicals.
The choker piece should be removed from the leather if using a polishing cloth which is impregnated with chemicals to avoid discolouring the leather.
Strong chlorine blackens sterling silver, so remove before swimming in highly chlorinated pools.