I purchased the Harmony Clearwater Spray Skirt for use on my Perception Swifty 9.5 kayak, which is a large cockpit recreational boat(I bought size XL). So far my paddling has been on the lakes near my home in SW Colorado, elevation 7000 ft.
With the large cockpit, the boat was subject to the drip off the paddle and spray from the occasional wind and waves. Several times I found my clothing drenched and water on the floor of the boat where I stowed things like fishing gear, water bottle, etc.
The skirt does just exactly what it is supposed to do. It fit the boat snugly yet is still easy to install. It kept me and my stuff dry, and added a great deal of comfort to my last excursion on a rather large lake on a windy day with waves approximately 11/2 to 2 feet high. I'm very happy with the product.