Go for Sulphate free and Alcohol free products
Don’t use product which contain Sulfate in them. It will damage your hairs. Go for a good quality conditioners. Which will make your hairs to look stylish and you can increase lifespan of them.
Always go for a soft brush to detangle your hair without damaging it. You should be very gentle as pulling can break your hairs.
Always remember do not brush your hair extension when they are wet. This will spoil the your hair extension. Either brush them before washing or when they are dried.