I've been fooled by ............?

[peppercornrent]

A pair of fleece lined leggings.

They're basically just thick narrow joggers. Still comfy and warm, not really sure what I was expecting, but not this.

Lobster. It's basically posh prawn. It's delicious and I'd order it when I can, but it is just posh prawn.

I have some actual fleece leggings. They’re comfy but sometimes too warm. Don’t wear them much.
I wanted some waterproof trousers to go walking in and accidentally bought neoprene - basically half a wetsuit. I now know that’s not what I wanted!

I don't think lobster tastes anything like prawns.

A smooth criminal. Thanks for the earworm, OP!

Snap!

And that is now also my earworm, not such a bad thing!