Our 3D silk lashes use disinfection treatment Korean PBT fiber that is the best material on the market. We have MSDS for this material. It can be used up to 20 times as good as new. Advanced technology can ensure lashes maintain 3D effect over 1 year without deformation. Our vital lashes are consistent whatever left and right eye or different batches and our cotton brand doesn't harm the skin. We can customize the lashes and packaging according to your requirements.