CST Platinum Protector High-quality puncture protection! Of course, all tyres can have a leak, because they are once filled with air. Riding comfort also plays an important role. CST only uses high-quality tyre materials to ensure high puncture resistance. With the ultimate puncture protection series, you can go on an extended bike ride with peace of mind. The CST Platinum Protector combines two materials in an ideal way: The protective rubber belt pushes back sharp objects and theEPS fabric layer prevents pointed objects from puncturing the tube. - Puncture protection layer (EPS+LDP) .