

ThinkPads utilize fiberglass ("50% GF" refers to the fiberglass used) to improve the durability of the plastic while recycled carbon fiber is used in the Latitudes. Both Lenovo and Dell use reinforced plastics to improve the durability of their machines.

Something worth note regarding the plastics used in these machines is that they aren't just your typical plastics. That's coming from someone who daily drives a ThinkPad T480 with a rough plastic finish, by the way. Plus, the coating just feels cheap to me. I can't say I enjoy having sweaty wrists.
Plus, during the hotter times of the year, I’ve found that these sticky, rubbery coatings just promote sweaty wrists. If you're not like me and learned how to type correctly (using most/all of your fingers), this might not bug you as much, but my wrists end up moving enough where how grippy the plastic is gets frustrating. Personally, I cannot stand rubberized palmrests, and that’s largely due to how I type.
