Fill sand is a substance comprised of very fine particles of rock. Having been sifted down to the smallest sizes, fill sand has a very high compaction rating. Compared to fill dirt, it’s more aesthetically pleasing and doesn’t retain moisture. However, it also doesn’t retain its shape or remain sturdy as well as fill dirt, so choose according to your project.
If you need help deciding which fill material to use, please refer to our article on the difference between fill sand & fill dirt.