Gel insole: 1.CE,ISO13485,Reach Report 2.relax and gently ... feet 3.OEM service 4.high quality-price ratio. Gel insole: 1.CE,ISO13485,Reach Report 2.relax and gently ... shoe,boots,and sneakeers.Instructions:1/For cold use: place pouch in the freezer for half and an hour before using ... to cool 2/For hot use: soak it into hot water approx 80-90 degree celsius for around 3minute gel insole for foot massage