Pressure Relief Extra Firm iCoil Hybrid This mattress is one that is designed for those who enjoy a firm bed to sleep on. ZINUS 12 Inch Euro Top Pocket Spring Hybrid Mattress / Pressure Relief / Pocket Innersprings for Motion Isolation / Bed-in-a-Box, Queen. Visit the Zinus Store. List Price: The Pressure Relief Euro Top iCoil Hybrid Mattress has a half-inch top layer of fiber padding covering three layers of foam and 7.5 inches of individually pocketed springs. 4.3 out of 5 stars 477 ratings. In this review, we’re going to tell you everything you need to know about one of the most popular, and affordable, hybrid mattress models: the Pressure Relief Gel Memory Foam iCoil hybrid. Zinus 13 Inch Euro Top Pocket Spring Hybrid Mattress/Pressure Relief/Pocket Innersprings for Motion Isolation/Bed-in-a-Box, Queen 4.4 out of 5 stars 417 $403.68 Zinus 12 Inch Cloud Memory Foam Mattress / Pressure Relieving / Plush Feel / Bed-in-a-Box / OEKO-TEX and CertiPUR-US Certified, Queen With an upper layer that feels like a plush pillow top and supportive, contouring high-density foam and innerspring coils, the experience is one of cushion and responsive support.