Grade AAA dehydrated long fiber New Zealand sphagnum moss (S. cristatum) by Besgrow is of the highest quality, light brown/cream color with some green tips. 150g expands to 3.2 US gallons when hydrated. Long fiber sphagnum moss is an ideal substrate for dart frogs. It holds a lot of water to maintain humidity while staying aerated and not soggy for months. Besgrow's New Zealand moss is the highest quality sphagnum available. It is void of sharp fibers and other debris, has exceptional durability, and is a beautiful golden brown. Compare this product to the Zoo Med version. It's is better quality at 1/2 the price! Given proper drainage via a layer of gravel underneath, this sphagnum moss will last for at least 4-6 months. It should be replaced when it becomes soggy and begins to beak down to maintain a healthy flooring for the frogs. Sphagnum is also an excellent substrate for growing orchids and other epiphytic plants.