Description European Certificate: EN ISO 20347:2012 The upper of  Clog with PU insole Soft Works is made of  EVA (Ethylele Vinyl Acetate), a super light material, which allows  extreme comfort and high impact absorption. INSOLE – PU(Polyurethane), with upper fabric super comfortable. Contain antimicrobial that attenuates the odor on the feet. View the online catalogue for further details.