ever see pads like this to float a hoist?

[blurry]

Any idea what these pads are? person who posted said they are "4 ft by 4 ft, commercial packing insulators"

link: #11

 

[blurry]

found them in Michigan: https://www.liftsladdersanddocks.com/foam-floats-swim-rafts/
and ebay: https://www.ebay.com/itm/The-WaterP...814933?hash=item23a10ca195:g:iC4AAOSwuq9ZYmhl

local marina seems to have some at twice the price!

 

[Scott Danforth]

its high density closed cell foam