The thermoplastic elastomer feels stiff and weird when taking the tube out of the package. But one immediately notices the weight difference. Installing the tube is more or less the same as with a conventional tube, however a few differences due to the new material and production process remain.
When inflating the tube for the first time without a tyre, the Tubolito actually forms a rectangular shape rather than a loop. No worries, as soon as you mount it inside the tyre, it moulds itself perfectly well. In the same manner, the valve might actually point outward instead of inward. Simply twist the tube and continue, it will stay in place once placed on the rim and inside the tyre.
Apart from these two peculiarities which have no negative effect on the performance, the Tubolito mounts just like any other tube. Mount one side of the tyre on the rim, slightly inflate the tube and place it inside of the tyre, then mount the second side of the tyre. After, inflate to the desired pressure and you are ready to go.