I kayak the Columbia betwixt WA and OR in a little 9' New Wave Sleek. At times the waves are monsters, with my kayak spending more time underwater than above. This thing rules the universe. Keeps all water out except for any little amounts that happen to run up my arms then down the pits & back. Usually after a rowdy crossing, I'll have a half cup in the kayak. This thing has literally saved my life multiple times. It was a bit spendy but so what. It locks around the kayak lip very well and is not going anywhere until you pull the nose loose.