Double YY 4D Eyelash Extensions

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Double YY-lashes are 4D lashes in 0.07 mm thickness, each lash consists of 4 flat lashes put together.

How are double YY lashes (4D) different from 3D pre-made lashes?
The structure of a 3D pre-made lash is 3 classic single lash extensions, as opposed to a double YY-lash which is 4 flat lashes put together. A classic lash does not split at the top and therefore appears thinner than a flat lash, even though the width/thickness of the lash is the same.

YY, W and double-YY lashes are multiple flat lashes together, and the flat lashes are spread out more than pre-made lashes. This gives wider volume as the lashes cross over each other.

A flat lash in 0.15 mm has the same width as a classic single lash in 0.15, but a flat lash is flat at the bottom and is therefore only 0.07 mm high. A classic single lash is 0.15 mm in thickness from all angles. This makes a flat lash lighter in weight.

The structure of a classic single eyelash extension and a flat eyelash extension is different even though they are made of the same material: PBT fibers.

Watch our free informational video for more knowledge about yy-lashes, their anatomy and how to apply them: free video