We have the Karbon at Spirit and most pilots have migrated to it. I bought it with company reimbursment but also still sometimes wear my trusty old Perrone leather from my regional days.

It's a nice and functional jacket. But the sizing is funky, so do not order the combo (shell and liner). Since you guys have a uniform sweater I'd say just get the shell. It runs big; I'm a size M in real life but wear a S Karbon.

Here's what it looks like: Southwest Airlines – Karbon2

Personally I think jetBlue should just reinstate the leather.