Design-Your-Own Ultra Deluxe Spa & Hot Tub Covers: 6/4 Taper with 1.0# Foam Base Cover with R-23.85
Product Review (submitted on October 10, 2012):
Very impressed with the quality of this cover...was a little nervous how it would fit (with my measuring) but it's perfect! Super thick and sturdy! Big difference from the one we originally had on the hot tub.