(Copy) Generic 2m x 2m - Charcoal - (22cm Radius)Vapour Barrier Our 6mm vapour barrier protects against water absorption better than the industry standard 3mm barrier. Drainage Drainage grommets allow for trapped moisture to escape which keeps your cover lightweight. 5" Skirt A five inch skirt keeps heat inside with a snug seal that extends all the way around the spa. Metal Channel Two parallel C channels provide support along the entire length of the cover to protect against heavy snow loads or