It is an impregnated textile material with chemical activated resins.  It is activated by immersion into solvents, and conforms direct on the last. Requires at least 24 hours for total evaporation of the solvents, being suitable for shoes with leather upper and for small sized COS, because it is necessary a lot of lasts and does not require molding dies. The open time of the material depends on the type of solvent.