Yeah you can, if you pull the drain plugs in the floor and use a stiff bristoled brush to scrub it. but water can get stuck in places and could end up causing rust problems if it isnt dried out. I havnt really noticed if it makes the cab warmer in the summer, always have the windows down or the air on. the transmission hump does get warm but not to hot to touch. There is obviously some more road noise because the padding and carpet are gone. I would recomend using something that is not as rough as herculiner, the texture makes it harder to clean.
1998 Ranger XLT 4x4 Off Road
3.0L 5-speed 33's on 15x8 wheels
4.88 gears, expo L/S 8.8, locker in the front
T-bar crank, chevy drop shackles, and 3" BL
Lots of custom dents and scratches