The new slick is our newest tire in our line; it has a new tread pattern giving you 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 be the only airless bike tire that weighs the same as the standard tyre, tube and rim; Combination strip; plus the minimum weight and strength, the slick repels the elements and offers a 5000 miles of flat-proof riding; the new slick even excels in wet conditions with greater grip and does not offer Stretching in the heat.