• Thick polyethylene film 400 microns, blue (the material is of course subject to dimensional variation, approximately 1%). • Ideal for indoor pools. • With antioxidant treatment to avoid of any deterioration of polyethylene by chlorine. • Weight 370 g/m2 (+/- 10%). • Variety of finishes manufactured: no rail, with rail on 2 backs, with rail on all sides • Treatment against UV rays. • 2 year warranty.