Or at least tubeless tubulars, like Tufo:
Regular tubulars look like on the right side. A cotton tube sewed together with a basetape covering and a thread glued on the other side. Added are a latex tube inside. But Dugast is making progress and gluing and adding latex to the cotton so loosing both seems and tubes. Makes the construction better so riders like Nino Schurter and Wout Van Aert can ride with higher pressure but with same grip and plushness. The solution also saves 10% in weight compared to regular tubulars.
Tufo has always done this but with rubber all the way so have been pretty harsh. But who will follow Dugast now when they soon are releasing their tires leading the industry once again?