Description (copied from the manufacturer):

Ergonomic design perfectly merges form and function for creating the most expressive eyes

Features a sturdy construction and smooth opening/closing action for precise performance

Thick, rounded silicone lash pads are hypoallergenic

Silicone pads won’t crimp or stick to lashes

Silicone is superior to rubber as it lasts longer, is easier to clean, and won't cause irritation