Description With very little effort, you can beautify your landscape with lava rock. This 0.5 cu. ft. bagged decorative red & black lava rock fromFloweRock is all you need to add a pleasing touch around trees, shrubs, decks and more. It’s rich colors will instantly update the appearance of your outdoor setting without fading or getting washed or blown away. Unlike mulch, these lava rocks won’t attract wood pests. You can also use it to retain soil moisture and control erosion. Product Features: Permanent Mulch Replacement Made in the USA 100% Natural, No Coloring or Additives Safe for use in gas grills and fire pits