Ergonomic Design - The Special 3D Curve Design Can Absorb Small Movement During Sleep While Reducing The Pressure On The Head And Neck. Lightweight, Flexible Breathable - Manufactured After Countless Tests To Achieve The Perfect Balance Between Support And Comfort. More Energy In The Morning - Feel Fresh All Day Long But Patience Is Important: A New Pillow Can Be Unfamiliar At First, Especially When You Switch From A Down Pillow To A Neck Support Pillow. In The First Few Days You Can Even Feel A Kind Of Sore Muscles, You Have To Plan 2-3 Weeks Until The New Pillow Fits Perfectly. If The Pillow Is Too Hard With The Cover Provided, Try It Without The Cover, This Will Allow The Airballs To Spread Even Better Tips For The Greatest Comfort: If You Are Sensitive To Odors, Let The Pillow Air Out On The Window, Balcony Or On The Terrace For The First 2 Days During The Day. Alternatively, You Can Also Wash It In The Washing Machine Before Use Because It Is Ideal For Machine Washing