I have an 8X12 sunbrella equal tarp that goes over the boom, to the back stay and out to the life lines. Mine is made of a white cloth. So it does not soak up the suns heat. It does let a bit more light than I would like at times. but it is cooler under it than with out! Mine also has a zipper to allow it to be opened on the side, much easier to get in vs crawling under like the original one that came with the boat, also a bit smaller at 6x8.
$400 for mine was pretty reasonable vs a bimini @ $$$$$?????
She drives me boat,
I drives me dinghy!