Bio-Foam® Impression Foam is an easily compressible foam, engineered for accurate foot/shoe impressions. Bio-Foam® Impression Foam accurately captures and reproduces an impression in seconds! This Impression Foam is praised for its ease of handling, durability, cleanliness and unmatched quality. Because of its closed-cell structure, Bio-Foam® is moisture-proof to prevent distortion and contamination. Bio-Foam® is used to take detailed impressions of a suspect’s shoe. Simply press the known shoe gently into the foam. The resulting impression will provide an accurate detail of the shoe for future comparison. Sold in a single pack. All Bio-Foam® Impression Foam slabs are sized 13.75" x 5.875" x 2.25"