For the modern outdoorsman! The Flat Oak Interior is handcrafted from recycled white oak whiskey barrel and carbon fiber. The ring has a flat profile, carbon fiber exterior and wood interior. The Flat Oak is raw wood, meaning there is no resin coating on the ring which gives it a masculine, natural look. Wood oil may not be necessary with this ring, as it sits against the natural oil of your skin - but just a drop every now and then will keep this ring looking lustrious and new!