The Coretec Premium Midnight Oak Luxury Vinyl Collection features a waterproof foamed core with an enhanced integrated bevel. It has 9in x 72in planks with a 10 mm thickness and an attached soft step underlayment. This underlayment was designed with 3 qualities in mind - quiet, warmth and sustainability. Crafted from 100% recycled plastic bottles, the Soft Step technology offers flooring that has best-in-class sound reduction, a warm underfoot, and offers a comfortable feel.