For what it's worth, Jeff is a fan of cork grips and stocks those:
Grips I stock cork grips (130mm long and 35.5mm thick in the middle) – these are very light at 26 grams a pair and firm yet shock absorbing. They are covered on the ends to keep water out and best when used in combination with bar tape. And I also recommend ESI Silicon grips as a good option. Both are available in the store.
Read More: http://www.jonesbikes.com/h-bar.html#ixzz2cuJCktj2
Jeff is an interesting guy, one of those unique cycling characters and innovators like Grant or Jan. He's not just some industry guy cashing in, he loves cycling and cycles to the beat of his own drum.
It almost looks like Jared is using them on his Hunqapillar.
--mike