Kiln-Dried Alder Hardwood Our frames are carefully crafted alder wood. Kiln-dried refers to the process of placing sawn lumber into kilns where heated air circulates in order to absorb all the moisture without jeopardizing the strength and structural integrity of the end wood product. Corner Blocks Corner blocking is a furniture building technique where a corner block (typically wood) is wedged, screwed or glued in at a corner of a furniture frame to ensure stability. Corner blocks help keep legs or frames from ever wiggling. Sinuous Springs Sinuous springs are two-dimensional "S" shaped wires that run from the front rail to the back of the seat, spaced every few inches. Support wires cross laterally and provide additional stability and support. EJ Lauren furniture features springs doubled on each end to provide additional support where pieces usually wear the most. 1.8 Density Foam High resiliency foam High-resiliency foam returns to its normal shape when subjected to pressure and doesn't disintegrate over time.