93brand's "C-SPEC" range just relaunched, introducing a few modifications to the typical BJJ Gi. The intention is to improve the traditional kimono design, in the areas where Jiu Jitsu has evolved but the uniform has not. The main materials are Pearl Weave (550 GSM) for the top, and a new Drill Cotton (10oz) for the pants. Here's their run-down on this model:
A more thorough breakdown of the construction mods can be found on 93brand's site, but we don't want to throw a wall of text at you.