But... Costco already sells apparel. I buy a lot of clothing there.
People have different ideas what that implies with regards to materials, fabric weaves, stitching and construction.
And TikTok videos that go into detail get a lot of views! it can be very interesting and informative.
Plus, for someone like me, when I see you say "high quality" I assume you're just doing marketing puffery, and dismiss your sales pitch, assuming you mean poly or a poly blend with simple construction. If you were like "long staple cotton" then I would really pay attention.