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1.Material:100% silicone with digital watch

2.Standard Size:16cm,17cm,18cm,19cm,20cm,22cm

3.Water Resistant:1ATM or 3 ATM

5.Functions: 

         1)Never pain caused by lifting 

         2)Improving sleep,increasing sleep depth 

         3)Health body,the whole family benefits 

         4)Elimination of edema,inflamation,and improve cerebral circulation insufficiency 

         5)Full adjustment of cervical & surrounding tissue function,eliminating the disease 

         6)To restore normal physiological structure of cervival spine to achieve traction reduction of the role of changes in cervical missing bit

         7)to ease or eliminate bone hyperplasia,a new trend of shopping available.