Style: butterfly groove design Standard: 59*34*11/6cm Materials: NASA, magnetic fabric, natural jade Specialty: 1. The butterfly groove design for human body to enjoy best sleep. 2. NASA can reduce 87% pressure of neck and shoulders and effective relax neck and shoulders 3. The natural magnetic fabric can promote blood circulation, improve sleep. Function: 1. Relax neck and shoulders 2. Good for sleep Apply to: 1. People of sleepless or bad sleep 2. People with neck tiredness or neck illness 3. Elders with high blood pressure and cardiovascular and cerebrovascular diseases 4. Women with rough skin 5. Students of prepare for examination