Panaracer T-Serv Messenger bike tires are what you're looking for. They're lighter than the gatorskins and work incredibly well. I rode one pair until the tread was gone in SF (several years) and never got one flat tire.
That's a nice option to have, thanks for sharing. I used Gatorskins (Hardshell and the normal version) until the tread was gone the past couple of years. This year I fitted some Continental Grand Prix 4-Season that are holding pretty well against punctures.
Might give these Panaracers a try when the tread of the GP are gone (or if I start getting punctures but so far they are as impervious as the Gatorskins for me).
https://www.panaracerusa.com/collections/commuter-city/produ...