Paul Mitchell Tea Tree Lemon Sage Thickening Spray 200ml. Paul Mitchell Tea Tree Lemon Sage Thickening Spray is a lightweight, body-boosting styling product designed to add volume and fullness to fine or limp hair. It helps pumps up skinny strands and grips fine hair for added control with a fresh, no-product feel. Infused with an invigorating blend of tea tree oil, lemon, and sage, this spray provides a fresh, energising scent while helping to strengthen and protect hair from environmental stressors.