The wood that is used in our cutting boards is the same wood that has been used for many years. Cherry, Walnut, Maple, and Purpleheart are all closed grain woods which make them ideal for cutting boards because they don’t absorb moisture and bacteria as much as open grain woods like oak, pine, or ash would. However, even closed grain woods will absorb moisture which will cause the wood to expand and contract if exposed to moisture for extended periods of time. Don’t leave your cutting board submerged in water like the sink or you will find that it will absorb water and might expand, warp, or even crack along the joints.