Dura Coil is specially designed to provide more support and offers a firm edge with 4 different product types. Half Dura Coil, Half Dura Coil Micro Edge, Basic Dura Coil and Dura Coil Plus. Boyçelik successfully developed Dura Coil with greater support resilience than traditional foam cover on the edges. Every type of Dura Coil springs have flexible edges and allowing for natural movement that lets your muscles relax.
Video link is below.