Secol spare a3 clear polyester pockets for a3 portfolio boxes pack of 50 secol polyester has always had the best reputation for its umatched archival safety and strength but also the sheer optical clarity of the material which comes to the fore for print presentation a print in a secol portfolio will always have the edge over cheap plastic display pages because the colour rendition and sharpness let the print come alive rather than taking the edge off it