nastrovjeIt's heavy.
For real, I have no idea. I assume it's just weight/space it takes. I bought one and I haven't even gotten it yet because I&S sent it directly rather than passing it off to Massdrop - USPS courier instead of DHL, so I'm gonna have to pay a bunch of customs charges as well.
That said it does look very nice (pictures at least), even at the $40~ I paid including shipping I feel it was worth it.