The Bostrom+Serta 10-Series HD truck mattress offers the highest level of support and comfort through all seasons. A full ten inches in thickness, the design is constructed using three supportive foam layers for optimal comfort. A top layer of blue Serta® Cool Action™ Gel memory foam is infused with a cooling gel and provides excellent heat dissipation to improve sleep quality. The memory foam also helps eliminate pressure points and to reduce the need to toss and turn during the night. With a firm base layer and medium density middle layer, the 10-Series HD mattress can support drivers of all sizes and weights. Excellent for larger drivers or for those who prefer a firm support, the 10-Series HD mattress is the perfect ultimate in comfort on the road.