Lighter, more compact and more durable. Yes, you get all three. WTB introduces the NanoAir TPU (thermoplastic polyurethane) tube. It's compact and only a third of the size of a traditional tube. Just think of the extra things you can put in your bag; a drink, snacks, maybe even a snack for your friend who always forgets one, yes, you know them. It's light. As in we mean really light. 60% lighter than the paperweight (cough, cough) you're carrying around. "But it's so light", you say, "how is this better than my paperweight tube?" Don't worry, these TPU tubes are tough, with a special construction/layer of materials, they're more durable than traditional butyl tubes. Having one of "those days" and you ride through a field of thorns and get another flat? Don't worry, we've added some extra TPU patches to keep you going.