What makes it different? What is the structure?

"Because its an all-aluminum cylinder it is lighter and has better cooling performance. That means there is no worry of losing power because of the engine getting too hot at times when there is not enough running wind flow, like traffic jams and on uphills. A conventional cylinder has a steel sleeve, but the DiASil cylinder doesn’t need a steel sleeve because it is made of abrasion-resistant aluminum alloy. The all-aluminum combustion chamber has a heat dissipation rate that is three times better than steel, which means great cooling performance."