2cloud9 Knee Pillow. Made of 100% Latex Rubber Foam. Bonus a 100% White Cotton Pillowcase for Conventional Use (Red) Perfect knee pillow for those with knee pain problems providing perfect alignment for spine, knees and hips. A multi-purpose, lightweight, medium-size travel pillow for adults and children. Guaranteed for 2 years. Highly Versatile. Use as a conventional pillow for toddlers or adults, for travel and as an exceptional lumbar cushion in autos, planes, at the office or home. Made of high-performance 100% natural rubber latex. Hypoallergenic and naturally resistant to dust mites, mold and mildew. An environmentally sustainable, eco-friendly product that's completely biodegradable at the end of its useful life. Certified by the ECO institute of Germany. Dimensions: 17.5 x 12 x 4 inches