I'm going to chalk it up to inexperience, but the black adhesive is quite thick and difficult to work with (especially when needing to trim the eyelashes down to fit my eye). The adhesive itself just came off after a while so now they're regular false eyelashes that need eyelash glue. I love the look of the eyelashes (#1 is my favorite, very natural) but without that adhesive strip, there's not much point to them?