And you dont want it closing down on to your pride and joy . So yes anything to stop rain water sitting inside the box sections . Just had to re position my cover,, the wind last night lifted the cover up over the bumper on the rear . But on my old cover i used a pair of small g clamps and a piece of wood to clamp the cover to the bumper .It stoped the cover moving ...could not find them this time in my garage , so i used a large pair of spare battery charger clamps ,these worked .Ther is 2 foot under front bumper but i cant pull the cover bach any more the pockets for the mirrors wont let me .