FSC® certified WISA Spruce Plywood is made from spruce veneers throughout, harvested from FSC certified forests in CHINA, normally bonded together with a phenol formaldehyde adhesive, which has superior resistance to loss of bond strength with time. Spruce is sturdy and resilient softwood that is easy to work. Exceptional process and quality control demonstrated by this manufacturer make MEGA products market leaders in their class. WISA spruce is a truly excellent product.