Since 2022, this mascara has been deceiving my friends into believing that I have lash extensions.

      As a beauty editor who tests makeup products professionally, I can confidently say that I've experimented with some of the finest mascaras available. From drugstore options to premium formulas, as well as tubing mascaras, those suitable for sensitive eyes, and even brown ones, I've tried many varieties, and only a select few are ones I would repurchase consistently. My fondness for L'Oréal mascaras is well-known, but another favorite that I don’t highlight enough is the Mac MacStack Mascara. Since its launch in 2022, it gained rapid popularity on TikTok, and justifiably so. True to its name, this groundbreaking formula is designed to be buildable, allowing you to add as much drama as you wish. Initially, I was skeptical about the claims, but after using it regularly for three years and receiving daily compliments on my lashes, I can affirm that this mascara lives up to the hype. Below, I've shared some impressive before-and-after images and included all the details I, as a beauty editor, believe you should know about one of my all-time favorite formulas.

      **Mac MacStack Mascara Review**

      **The Brush and Formula**

      It's important to mention that this popular mascara comes in several variations. You can choose from the micro brush, the mega brush, a waterproof option, and a brown version. As someone with very oily eyelids, I always prefer the waterproof version with the mega brush, which is specifically designed for the upper lashes (I typically only apply mascara on my upper lashes). As previously stated, the innovative formula is stackable, which is reflected in its name. The brand touts it as "endlessly buildable" thanks to its clump-resistant composition. It's designed to provide both volume and length, making it perfect for those who enjoy a more dramatic eye makeup look.

      **The Application**

      Since my eyes aren’t particularly large, I was initially concerned that the micro brush would be too bulky for me when I first used it in 2022. However, I was pleasantly surprised by how quick and easy the application is. In fact, I don’t find myself needing to clean up any accidental smudges (which usually happens with me) when wearing this mascara. The formula itself applies beautifully to each lash. Sometimes I struggle to reach the difficult corners at the inner and outer edges of my eye, but it’s a minor issue. The before and after results are consistently impressive, so I can overlook this small detail.

      **Before**

      **After**

      One Coat of Mac MacStack Mascara

      Two Coats of Mac MacStack Mascara

      Three Coats of Mac MacStack Mascara

      **The Verdict**

      As demonstrated, this mascara is undeniably stackable. In the images above, I applied three coats, achieving a false-lash effect that I usually only dream about. If I had to mention one small drawback (which is not very significant), it's that the claim of any mascara, including this one, being completely clump-resistant is bound to fall short. I find that three coats is the sweet spot before experiencing slight clumping (although it’s still very minimal compared to other formulas).

      Beyond the truly impressive lengthening and volumizing results, what I particularly appreciate about this mascara is its longevity. Typically, when I choose a more intense formula, I end up with black smudges under my eyes within hours. However, this formula stays put throughout the day, keeping my lashes looking long and uplifted. If you're considering investing in a new makeup product this month, I highly recommend trying the Mac MacStack Mascara.

      **Shop Mac MacStack Mascara**

      **MAC**

      MacStack Mascara Mega Brush

      Find the original mega-brush version here.

      **Pros**: Buildable formula, delivers length and lift, long-lasting

      **Cons**: Can get a little clumpy after several layers, slightly more expensive

      **MAC**

      MacStack Waterproof Mascara

      My personal favorite is this waterproof formula.

      **MAC**

      Macstack Mascara Micro Brush

      This micro brush is perfect for your lower lashes.

      **MAC**

      MacStack Mascara in Chestnut Stack

      Brown mascara really enhances the appearance of blue and green eyes.

      **MAC**

      MacStack Elevated Mascara

      A newer addition to the brand lineup is the Mac MacStack Elevated Mascara, featuring a curved brush for even greater lash lift.