An assembly including a boat and a cover. The cover covers and protects the boat. The boat is provided with one or more covered portion, and one or more uncovered portion. The cover includes a protective covering, and a boot. The protective covering defines a tolerance cut out adapted to receive a portion of the one or more uncovered portion when the protective covering is covering the object. The tolerance cut out has a length, a width and a perimeter. The boot is provided with an upstanding material flange, and a sealing system. The upstanding material flange extends about the perimeter of the tolerance cut out so as to define an opening aligned with the tolerance cut out, the upstanding material flange extends upwardly from the protective covering. The sealing system is positioned upstream of the tolerance cut out and on the upstanding material flange for sealing the upstanding material flange along the length of the tolerance cut out.