I have a Seamax boat and love it and thought I would try the 18’ mat as I’m tired of all the water in my garage when I park inside over the winter! It snowed yesterday and my SUV was covered in snow by the time I got home and decided to park inside on my new mat. Went outside to the garage this morning and was scared of the mess I was going to see but the oor was bone dry! I used my shop vac to suck up all the water o the mat and there was 25-30 gallons! GOOD PRODUCT EUROPA!!!