Medium firmness with a cooling gel-top layer on one side and perforated bamboo charcoal memory foams that improves airflow between you and the Gel Pillow. For those looking for cooler sleep temperatures, this pillow is ideal for warmer climates or for people who sleep hot. It features a cooling gel-top layer on one side, which provides additional cooling qualities and helps regulate sleep temperatures. The sustainable bamboo charcoal memory foam provides a fresh, breathable benefit that improves airflow between you and this comfy pillow. Medium firmness will help retain its shape and adapt to your head size, relieving pressure to ensure a restful night’s sleep. Size: Standard: 27" x 20" King: 36" x 20" Materials: Cover Face: 35% Viscose from Bamboo / 65% Polyester Reverse: 70% Viscose from Bamboo / 30% Polyester Fill: 100% Bamboo Charcoal Memory Foam with Cooling Gel Package Includes: 1 pc x Gel Pillow Care Instructions: Outer Cover: Machine wash cold. Tumble dry low. Do not bleach. Cariloha, founded in 2007, is a global brand that specializes in bedding, clothing, and bath products made of soft, sustainable bamboo-viscose. Cariloha provides an exclusive selection of bedding, clothing, sportswear, bath products, and more created from this soft, cool, clean, and green fabric produced from self-replenishing bamboo fields."