Rec Tec Premium Hardwood Pellets are made of 100% natural hardwood. The pelleting process concentrates the wood into a very dense form, much denser than a hardwood log. The density of Rec Tec Premium Hardwood Pellets creates the ability to store a large quantity of energy in a compact, easy to store bag of pellets. And because the pellets are uniform in size, the grill can easily automate the rate at which they are fed into the fire. This is key to a reliable and consistent cook.