◆This DES uses a biodegradable polymer coating on the stainless steel stent platform. The proprietary, top-quality coating process allows the integrity of coated polymer after excessive stent expansion and a systemic elution of sirolimus in a well -controlled fashion after the stent implantation. The safety and efficacy of the product is well documented from a related randomized trial in Europe in CTO patients showing low re-stenosis rate and very promising late loss data.