Quick answer

If you want a complete lash routine with two complementary products, the Lash Slick Duo offers better value at $27.20 compared to buying two singles separately. But if you only need one mascara, a single Lash Slick might be the simpler, more budget-friendly choice.

Why the Duo makes sense for most routines

The Lash Slick Duo bundles two Glossier lash products into one purchase, designed to give your lashes a polished, natural look. For anyone who likes to layer products or switch between a light and more defined finish, this set covers both bases without requiring a second trip to the checkout.

The catalog price of $27.20 represents a clear saving compared to the combined price of $40.00 if you bought the items individually. That’s a practical reason to choose the Duo if you’re already planning to stock up on more than one lash product.

When a single mascara is enough

If your routine is minimal and you only use one mascara at a time, a single Lash Slick may be all you need. The Duo’s value only matters if you’ll actually use both products. Buying a set you don’t fully use isn’t a bargain—it’s just extra product sitting in your drawer.

Also, if you’re new to Glossier’s lash products, starting with a single mascara lets you test the formula and finish before committing to a duo. You can always add the second product later if you love it.

The trade-off at a glance

  • Choose the Duo if...: You want two lash products to layer or alternate, and you’ll use both. You’ll save about $12.80 compared to buying two singles separately. Check that both products in the Duo match your preferred lash look before purchasing.
  • Choose a single mascara if...: You only use one mascara at a time, or you’re trying Glossier’s lash formula for the first time. A single purchase is simpler and costs less upfront. If you’re unsure, start with a single and add the second product later if you want more variety.
  • Value check: The Duo’s $27.20 price is lower than the combined $40.00 value, so it’s the better deal if you’re buying more than one lash product anyway. Only buy the Duo if you’ll realistically use both items; otherwise, the savings don’t apply.

Product facts

  • Lash Slick Duo: The Lash Slick Duo includes two Glossier lash products for a complete lash look, designed to define lashes with a polished, natural finish. You get two complementary products in one purchase, which is convenient if you like to layer or alternate your lash routine.

    Lash Slick Duo

    Lash Slick Duo

Who should buy which

Best for

  • Beauty enthusiasts who like to layer mascaras for different looks
  • Anyone who already knows they’ll use two lash products and wants the bundled savings

Not for

  • Minimalists who only use one mascara at a time
  • First-time buyers who want to test the formula before committing to a set