The Sirchie BIO-FOAM Impressions Kit is a quick and easy system of making footwear impressions without damaging or contaminating the footwear. Simply press the footwear onto the BIO-FOAM surface, spray on a thin coating of Aerosol Dust & Dirt Hardener (Cat. No. 638CA) and then mix and pour in Shake-N-Cast (No. SNC42) ready-to-use casting material. This makes a permanent impression of the footwear. The high-density foam provides extremely fine detail and comes packaged in a self-storing cardboard container.