Hi Rachelle,
Yes, the link I provided was the cover that fit my '22 400 boondock. It actually was a nice fit, not too tight or not baggy. It lasted 2 years before it started to rip. For this year's winterization, I tried to get the same, but they were out of stock. I decided to try another one from classic accessories,
https://www.amazon.com/gp/aw/d/B018M3JE8K?psc=1&ref=ppx_pop_mob_b_asin_titleThis cover also covers and fits as well as the other. However, it is much lighter and is made of ripstop nylon. Too early to say which one I would prefer.
Please note that the cover does fit over the front storage tub but is not long enough to cover the wide, front rack. If you have the side mounted storage tubs it probably won't cover those either.
Hth, let me know if you have anymore questions. We are currently camping in Ocala National forest in Florida.
Ron