Canadian Spa Company 78in Di Round Hot Tub Cover with 5in/3in Taper - Grey Extra thick 5 in/3 in tapered 1.5 lb density EPS Styrofoam cover inserts for unparalleled heat retention and strength Four (4) thick vinyl handles are recessed and re-enforced using the same vinyl to perfectly match the cover Protecting the foam is a 6 mil double coated, heat sealed polyethylene vapor barrier to increase the longevity of the cover and reduce water absorption A 5 in long continuous skirt is surrounding the cover to create an efficient heat seal A full-length steam seal extends the entire length of the fold to minimize heat loss