Type cover weight?

[uffestar]

In the tech specs the go type cover is specified at 1.3 pound while the bigger one for the pro is specified at 0.68. I chatted with the online sales agent but she didn't have any other info.
Can anyone confirm the weight of the type cover?

 

[LibbyLA]

I wonder if that’s the shipping weight, including the packaging. It would be odd if it weighed more than the SP keyboard and the Go itself.