gnarlydog1008807 wrote a review of SealLine Nimbus Sack on June 9, 2014
Familiarity: I've used it several times
I have several SealLine Baja nags and they are a little bit stiff in the smaller sizes (5-10Lt) for sea kayak hatches. I wanted something a bit thinner (not for hard items) that will fit better around the stiff stuff inside the hatch of sea kayaks. Nimbus seems to be the ticket with its shiny "kind of sticky" surface that creates a better seal when rolled down than some other fabric dry bags (the fabric wicks when wet).
Can't report on durability since that opinion will come with years of use.