Made in the Netherlands, A. Dugast latex tubes are made out of 100% natural latex. Latex tubes are stronger, suppler, more comfortable, more puncture resistant and have a lower rolling resistance than butyl inner tubes. A Dugast latex inner tubes are available in 51.5mm valve length option (42 mm only on request) and use Presta valve mechanism only. The latex tubes for clinchers are exactely the same as the ones glued in tubulars. A Dugast latex inner tubes are very thin (0.5 - 0.6 mm) as they are high performance tubes, so they do not use any inner braker or additional layer.