Schwalbe has introduced a new range of lightweight tubes. The Aerothan tubes are constructed from a thermoplastic polyurethane, which is said to be more puncture resistant than butyl and latex tubes while offering very low rolling resistance. The tubes are light too, just 87 grams for the 29” mountain bike version.
Innovation doesn’t come cheap, expect pricing around $25-30 per tube depending on size. The tubes are made in Germany, and are 100% recyclable.