I bought two - initially I didn't think they had latex tubes in because they're not super supple, but pumped one up and it lost 20psi overnight so I imagine they do. They are bonkers light.
I'll do a rolling resistance test so we can see how they stack up against Vittoria/Challenge Cronos too.
for all the hill climbers…
http://www.merlincycles.com/schwalbe-ultremo-superlight-tubular-tyre-700c-x-22mm-76304.html
weight saved + fear of puncturing= ride faster?