ENGINEERED SUPPORT — NOT A TRADITIONAL PILLOW: Built for extended naps, the Evolution X Neck Pillow is intentionally engineered to feel different (like a well-fitted new shoe, a brief adjustment period may be needed to get used to our unparalleled chin support). At its core are precision-designed plastic support shells, crafted for reliable neck support that flawed, traditional pillows cannot provide. QUALITY YOU CAN TRUST: We stand behind the craftsmanship and quality of our products. If you are not completely satisfied with your purchase, simply let us know — we’ll replace it or refund your purchase in full. Your comfort and satisfaction are always our top priorities. ADJUSTMENT #1 - CHANGE THE CIRCUMFERENCE OF THE PILLOW TO FIT YOU: One-time adjustment! Unzip the back zipper to release and secure the strap to adjust the circumference of the pillow to your preferred fit ADJUSTMENT #2 - CUSTOMIZE PILLOW TO YOUR EXACT NECK HEIGHT: It is the ONLY pillow that fits to you rather than you having to fit it. Shift top or bottom pillow lobes to dynamically adjust to your preferred height ADJUSTMENT #3 - FINE TUNE FOR PERFECT CUSTOMIZED SUPPORT: Pull the cord and ball lock through the closure ring, then press the button and slide to adjust Where first class comfort meets customizable support. The first pillow that adjusts to you, with three ways to adjust the Evolution X provides you with the opportunity to customize the height, circumference, and closure to your preferred fit. X-perience the difference when comfort and support perfectly intersect to provide an extraordinary travel experience.