Answer:
Sand is a type of naturally occurring material that is of a granular, loose, fragmented composition, consisting of particulate matter such as rock, coral, shells, and so on. Sand is typically finer than gravel but coarser than silt.
Explanation:
Cotton, silk, hemp, bamboo, linen, leather, feathers, wool, and rubber are all naturally-occurring materials and unless they've been irresponsibly processed or dyed, there's no risk of absorbing dangerous chemicals through your skin.
