In Korea. Pinus densiflora is one of the most important indigenous tree species in terms of making high-value wood products. Therefore. Korean sawmills exercise extreme caution to prevent fungal discoloration such as that caused by sapstains and molds on the timber. https://www.roneverhart.com/Heel-Elbow-Protectors-Premium-Heel-Elbow-Protector-Blue-Medium-Pair-66053/