Danner DLC Memory Foam Footbed 10. It was designed as a replacement footbed for the Caliper work boots but it fits any boot made on the DPDX last including the Mountain 600. The dual-layer footbed pairs soft memory foam and polyurethane for maximum underfoot cushioning. Specifications for Danner DLC Memory Foam Footbed: Manufacturer: Danner Color: Black Features of Danner DLC Memory Foam Footbed The Danner Dual Layer Comfort footbed is constructed from plush memory foam and polyurethane to provide instant and long-lasting comfort Non-Insulated Package Contents: Danner DLC Memory Foam Footbed Danner 90646-10: DLC Memory Foam Footbed 10