Glide Liner Long Lasting Eye Pencil combines the benefits of a liquid liner with the application ease of a traditional pencil while maintaining compatibility with Xtreme Lashes Eyelash Extensions. The silky-smooth gel formula glides on gently and easily, allowing you to achieve an ultra-pigmented, precise, and perfectly defined eye. Must be used exclusively with the Glide Liner Sharpener. For external use only. Innovative long-lasting gel technology Glides on easily and gently without tugging. Blends upon application then dry into a smudge-proof finish. Vitamin E-enriched. Compatible with Xtreme Lashes Eyelash Extensions. Hypoallergenic, dermatologist and ophthalmologist tested. Additionally, place the cap back on tightly after every use to prevent the gel formula from drying.