State-of-the-Art System - Arched 8-gauge steel serpentine springs (also called sinuous or zig-zag) Spaced a comfortable 3” apart, with double row at each end for extra support in corners • Secured to front and back of frame with metal clips, Teflon coated to prevent squeaking from metal-on-metal contact • Bound side to side with paper-wrapped crosswires for even weight absorption • Made from 65% recycled metal. (Note: Mechanisms also made from 65% recycled metal.)