• The flexible, arc-shaped seat slats work perfectly with the independent       pocket springs of the Advance Prime, Advance New & Optimum mattresses.
• With 18 [+2] elastic straps per side.
• The 2 additional ones are special, flattened flexible slats, for excellent support at the edges of the mattress. Available dimensions per crate type, width 80-180 (per 1cm) and length 190,193,&197cm.

•Recommended in combination with all mattresses of the Advance Prime & Advance New series