Volume are multiple eyelashes attached to one eyelash.
There are usually 2-6 false eyelashes placed on every natural lash for volume sets, depending on the desired look.
These lashes are very light, and don’t weigh down or damage the natural lash. Volume lashes give a much fuller and cleaner look than cluster eyelashes.
Volume lashes also have longer bond times because each volume lash creates multiple pockets of adhesive that form beam like shapes along the lashes.