All clothing items would be in one group, not broken down into "men's" or "women's"
According to Similar Items of Property in the IRS's Instructions for Form 8283,
Similar items of property are items of the same general category or type, such as coin collections, paintings, books, clothing, jewelry, nonpublicly traded stock, land, or buildings.
However, please read the instructions linked above. They might be helpful to you.
You must file one or more Forms 8283 if the amount of your deduction for each noncash contribution is more than $500.
