I am fabricating custom foot orthoses and Biofoam is the best media for creating impressions of the feet being treated.Used before easyThese foam impressions crumble and fall apart so easily. Not useable! We have old foam impression boxes that are many years old that work so much better than these.just what I was looking forOur school bought this in support of our forensic program to do lessons on footprints. Excellent stuff, works as advertised.The amount of casts included is misleading on purpose, company didn't offer to correct, way overpriced, and 2 of the 6 casts cracked during casting because they were so old. Advanced casting in Boise has fresh casts for 1/2 the price