The velcro 'hook' part will grab directly to the monkeyfur, and hold relatively well, but with constant use the monkeyfur will become shaggy, that is if the Parker adhesive holding the monkeyfur to the boat doesn't let loose first. The 'industrial' velcro has the best adhesive - sold in rolls at Lowes etc., and will stick very well to clean smooth gelcoat unless/until it gets hot while 'loaded'. We haven't had much luck even with the industrial variety on the 'textured' gelcoat even using alcohol and acetone as degreasers.
We used to attach stuff to gelcoat with a dab of silicone (permanent but removable) but find the 3M sticky tabs much handier.
PS
The guys at Velcro say the 'loop' stuff has about a 2 year life in UV conditions.