They may come from pacas (packs).
When people give used clothes or even new clothes to charities in the US such as Goodwill or St. Vincent dePaul those organizations sell about 20% of the donations in their stores and the rest is shipped in packs (that look like bales of cotton) to developing countries.
The more astute resellers in Santo Domingo sell the best items from the packs.
The less astute sell mounds of junk in which the patient buyer can find occasional gems.
WHAT REALLY HAPPENS TO YOUR CLOTHING DONATIONS?
Many Americans, especially American women are shopaholics, and quickly their addictions fill their closets and attics. On Saturdays here in Miami, I go a-cruising the yard sales, and it is amazing the amount of clothes that people have never worn even once they sell just to get closet space.
The best places are the areas that have named streets, like Coral Gables, because there is far less competition from the local bargainhunters who still have not figured out how to use a GPS.
I tried sending a couple of pacas to Barahona for resale, but it did not make much of a profit.
Costume jewelry and name brand shoes that I pick out myself in sales sell very well.
I am sure that the main problem I had was I picked the wrong paca company.
Many of them require you to purchase five pacas or more, which is of course, sight unseen.