Thickest Hot Tub Covers: 6"-4" Tapered with 1.0# (R23.85-R37)
Product Review (submitted on November 8, 2012):
Thank you! The cover arrived Thursday - there was a dent/hole in the box. The driver requested that we check the cover for damage before he left - very considerate gentleman. Helped me open the box. The foam was dented but the cover was not ripped - we didn't think it would effect purpose of the cover.
So thank you and we've been very pleased with the whole experience!