Product: Camco 45191 RV Reflective Vent Cover
Overall sentiment: positive
Customer reviews:
This fits over the bathroom vent with the fan and even fits fine over the turn knob to open the vent.  Happy. 
 works great 
 Bought for our RV and works as expected. 
 came to late for this season but looks very good for sun block
for the summer. Not the fault of the vendor, just found the product late in the season. 
 Exactly what I was looking for to block out the light. 
 a must have if you have a vent over your bedroom in an RV  Keeps the sun out and lets you sleep late.  (yes, we sleep late on vacations) 
 this thing works so good that its dark as can be,just what I needed,could not ask for a better product,fast ship and good price. 
 A bit short on one side, otherwise great deal!! 
 It really keeps the air out from my vent in my camper. I had to trim it a bit, but it fit good once I did. Very thick and weather bearing. I am happy with this purchase. 
 I have purchased these for any of the RV's we've had.  A good tip is to put additional Velcro strip tape around the ends for extra holding strength 
 Great 
 Works good.