Latex looses 40psi overnight - at the least. These weigh in at 85 grams. Heavy for a premium tube. Get your weight down to 76 grams with Continental Race Light for 23 the cost. Get the weight down to 75 grams with Michelin Air Comp for 12 the cost. I use both the Conti and the Michelin after trying latex and won't go back.
These tubes are very supple & light. They improved the ride quality of the tires I generally train with & in my experience they don't flat any easier than butyl tubes. Having said that, you can find butyl tubes that are almost as light for less money. If you aren't already in the habit of airing up your tires before every ride, you'll find that it's a must with these tubes. They are more porous than butyl tubes & therefore loose air at a faster rate. If you can find them on sale, they are worth a try.
I wanted to try these latex tubes that are advertised to have slightly better puncture resistance than other, lighter latex tubes. I also moved from Michelin Pro3 Race tires to Continental 4000s for the same reason. You still have to be super careful putting these tubes on. Don't even think about using a tire lever. Given how fragile they are, the fact that you have to put air in them every time you ride, plus the fact that I'm still not convinced they give weight and rolling resistance benefits you can feel, I'm not sure they are worth the cost and effort. Maybe if you are Pro Tour level it is worth it, but doubtful for the rest of us.
