English to Spanish Other Ships, Sailing, Maritime Boat covers

Hello,

I need to find an appropriate translation for the term HEM when used in the shipping & saling field.

Examples:

Tie-down loops are located above gunwale, not the hem, freeing the hem to drawn tight against the boat hull.

Continue pulling until the cords hold the boat cover hem as tight as possible against the boat hull.

I find "dobladillo", but I´m not sure if this is correct in this context.

Thanks in advance!