Any boots containing metal, such as zips, buckles or eyelets should be kept away from the beach/salt water. Salt will cause rust. If they do come in contact with salt water, rince thoroughly with  like warm water and minimal soap. 
We highly recommend using a protective spray (especially for our fabric Aria floral boots) to stop them from getting dirty or stained. This will act as a barrier and most substances will roll straight off.  We are working on our own protective spray but in the mean time it can be purchased from Platypus.
General cleaning should be done with a wet wipe/baby wipe/damp cloth when possible and for a deeper clean, luke warm water and minimal soap. Do not soak. 
If you have any questions send us an email!