Classic lash extensions look very natural, lengthening and adding fullness to your existing lashes. This look is better than any mascara on the market. Called permanent because they fall off only when the natural lashes are shed, individual extensions are adhered one by one to lashes across the lid. Materials vary widely—sanitized human hair, mink fur, fox hair, and synthetic lashes are all popular, and all have tradeoffs in weight, cost, and verisimilitude—but it’s the adhesive that gives them their longer life span. A full set usually takes one to three hours to apply and requires touch-ups to account for the different growth cycles of individual natural lashes. Since several extensions may be applied to each natural lash, looks can be created ranging from a subtle mascara effect to Bambi-begging-for-a-saltlick.