These pads give great cush for the tush. Both have textured bottoms to control slippage.
The Paddling Cushion (black) Specs
Weight: 13 oz 
Dimensions: 13" x 16" x 1" 
70 denier waterproof nylon cover. 
Rugged polyurethane integrated non-skid bottom. 
Tie down loops on each end. Folds for storage. 
The Extreme Cushion (yellow) Specs
Weight: 8oz. 
Dimensions: 15" x 10" x 1/2" 
70-denier waterproof nylon cover. 
Rugged integrated ToughTek® non skid, anti-microbial bottom. 
Tie down loops on each end. Folds for storage.