Excellent question! Bagged wood shavings (sawdust, fine and medium) are one of the most popular products used for horse bedding because of their many benefits, including their value-for-money, great absorption capacity, easy maintenance, and antibacterial and hypoallergenic properties. These characteristics make them a product of choice for your horses’ specific needs.
You can also find wood pellets, straw, paper shavings, peat moss, as well as some other lesser-known products.
For more details, read this article about the different kinds of horse bedding.