The ELO Adapt XL Desk is constructed of 1.125” thick MDF (medium density fiberboard) core. MDF is a superior material for screw holding abilities exceeding 250 lbs., breaking strength and load tests. The back material is phenolic which prevents moisture penetration to core material and provides an anti gum surface. The top material is high pressure laminate that is bonded to the MDF core making the total thickness of the top at 1.25”. The 0.25” beveled radius edge is finished using our exclusive Lotz Armor Edge™, a polyurea, which is extremely strong and durable. This edge will not separate from the MDF core material and makes the edge water tight.