How Do I Tell if My Blunt Umbrella Is Fake? (Metro XS UV+in Black)

I recently bought a black Blunt Umbrella Metro XS UV+ on ebay. It took a long time to arrive and it seems not that great quality.

I bought the black version and the UV version seems to look like it's lined with a cheap black plastic material. It's pretty unlikely but has anyone bought the black UV version that can send me photos of the underside?

Unlikely, but if you don't ask