I am a big believer in using what your stylist recommends, as they know what is best. It is true that you should not use any haircare that has PROTEIN in it, as it does destroy the bonds. What you enjoy, is the cosmetic feeling you get from the moisture in the products. I would recommend only using products with moisture, and no repair while you have your extensions.
All Soft Shampoo (R210) and Conditioner (R242)
Clear Moisture Shampoo (R210) and Conditioner (R242)
Hydrate Shampoo (R130) and Conditioner (R145)
Intense Repair Shampoo (R180) and Conditioner (R205)
Extensions are expensive so look after them well!
MIRRORS hair lab.