Lancôme Cils Booster XL Enhancing Lash & Mascara Primer – Eyelash Primer | Eyelash & Mascara Primer – Infused with Micro-fibers, Vitamin B5 and Vitamin E – Boosts Mascara Volume, Length & Curl

Customers find this lash primer effective at enhancing mascara application, adding length and volume to natural lashes, and making them look fuller and thicker. Moreover, the product prevents clumping and helps mascara stay on all day. However, opinions on value for money are mixed, with some finding it worth the price while others are not impressed with the cost.