Lighter, more compact and more durable. Yes, you get all three. WTB presents the NanoAir TPU (thermoplastic polyurethane) tube. It's compact and only one-third the size of a traditional tube. Just think of the extra things you can fit in your bag; a drink, snacks, perhaps even a snack for your friend who always forgets one, yes, you know them. It's lightweight. As in we mean really lightweight. 60% lighter than the paperweight (ahem, ahem) you're carrying around. "But it's so light", you say, "how is it 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 thorn field and get another flat? Don't worry, we've included a few extra TPU patches to keep you going.