Hot Tub Compatible With Cover Valet Spa Seat DIY5365BKHot Tub Compatible with Cover Valet Water Brick Spa Seat or Pillow 15 Iches x 12 Inches x 4 Inches DIY5365BK (Black) Listing is for 1 piece black spa seat (also can be used as a pillow) The Water Brick spa seat is a comfortable option for shorter spa users. Made of pvc coated vinyl, the Water Brick is well suited to the spa environment. To ensure the seat sinks easily into place, the Water Brick includes a pouch which can be filled with marbles or pea