Hey Chen!
Could you disclose the name of the technique used to make the new back surface more grippy?

I have clearly generalized too much yesterday when i stumbled over the term soft-grip used by NY attendees.
.
Now after a night of research i realize there are gazillions of material combinations and techniques to give a surface more grip and just the public/marketing reduces all to one term.

My gripe seems to be with bad and/or cheap mixtures of Styrene Ethylene Butylene Styrene SEBS used in the early days and in low end products nowadays.

Only the name would be enough so i can research further for myself. Thank you!

EDIT, Is there any image where we can see the new back? The NY attendees understandably concentrated on the front and i did not see a picture of the new back surface.