The new slick is our newest tire in our lineup; it has a new tread pattern that gives it greater rolling resistance than other tannus tires; the new slick is made with a patented puncture proof resin called aither 1. 1 that allows the new slick design to reproduce the weight and strength of a standard tire and is the only airless bike tire that weighs the same as the standard tire, tube and rim; combination strip; in addition to minimal weight and strength, the slick repels the elements and offers a 5000-mile guarantee of flatproof riding; the new slick even excels in wet conditions with greater grip and also does not offer stretch in the heat.