Half foam. Half down alternative. All cool. The Casper Essentials Hybrid Cooling Pillow is a dual sided pillow with a cool to the touch cover. Supportive fiber on one side and marshmallowy soft foam on the other make the perfect pairing for better sleep. Made with an ultra-breathable cooling cover for increased airflow, so you stay cool and comfortable throughout the night. Highlights: Supportive fiber on one side and marshmallowy soft foam on the other make the perfect pairing for better sleep. No matter which way you flip it, this pillow’s cooling knit cover stays cool for refreshing rest. Made with a medium profile, that keeps all sleepers aligned and cozy, especially side sleepers. Thoughtfully designed by the sleep experts at Casper and backed by a 1 year limited warranty so you can rest even easier. 120-night risk-free trial Specifications: Features: Rectangle (shape) Dimensions (Overall): 24 Inches (L), 16 Inches (W), 6 Inches thick Weight: 5 Pounds Fill Material: 100% PET (Polyethylene Terephthalate) Fabric Name: Non-Woven Fabric Textile Material: 52% Polyester, 48% Polyethylene Features: Cooling, Removable Pillow Cover Fill Density: Medium Thread Count: Non-Woven Fabric Pillow style: Universal Sleeper Pillow Care and Cleaning: Machine Washable Cover, Line Dry or Lay Flat to Dry Warranty: 1 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869