The way the end grain is configured, these boards help extend the life of your cutting knife. North American species and some exotic materials. Oak, Maple, Cherry, Walnut, Teak. Oil-rubbed with mineral oil and natural beeswax. Foodsafe. We're working on our own proprietary blend. We work with reclaimed material to the extent possible. Repurposed, nevitalized and ready for a place in your kitchen.