Topic: What does soft shell pro controller mean?

I was looking at ordering the below Zelda controller but the title says soft shell. What is a soft shell? is it same as the official controller? Also would I have to pay customs charges on this as I live in the UK and it is coming from Canada? Thanks for your help.

https://www.etsy.com/ca/listing/1517258539/custom-nintendo-sw...

Judging from reviews, it seems they used the same listing to sell soft cases for controllers in the past… maybe

I think they use the soft shells similar to extremerate shells, which are easier to hold and use for long periods. Love the design btw