The white powder contains alginate, a derivative of kelp that congeals when mixed with water to form a goopy paste. Other interesting ingredients in the powder include a clay-like substance called diatomaceous earth and calcium sulfate, which is also used in tofu as a coagulant. And, of course, because I was using the collagen mask, the formula also included a dose of hydrolyzed collagen. Here's how it works: "The 'rubber' is formed when water activates a reaction between the alginate ingredients with the calcium sulfate and pyrophosphate," explains cosmetic chemist Ni'Kita Wilson. "As the formula 'rubberizes,' the skin is tightened, which provides a temporary firming effect." Here's what the texture of the mask looks like once the powder is combined with water:

Applying the mask was easy—I liked that I could control the ultimate thickness of the mask, which meant I could keep it light and avoid the suffocating feeling of a superheavy mask (very important if you're claustrophobic, like I am). It felt cool on my skin and began to tighten immediately, taking on a rubbery texture.

Here's a tip: Don't dilly-dally when it comes to applying it. It congealed so quickly that by the time I'd smoothed it over half of my face, it was almost too solid to apply to the other half. You also want to make sure you apply it more heavily toward the outer edges of your face, which will make it easier to peel off once it's dry.

After about ten minutes, the mask was fully dry. Then came the fun part: peeling it off. While it didn't all peel off in one giant sheet like I'd hoped, it was nonetheless childishly entertaining and satisfying, like peeling apart a Fruit Roll Up to play with it before you eat it. And unlike the feeling of rinsing away a clay-based mask (my dry skin gets dry and tight), it seemed especially gentle. There was no tugging or difficulty, so my skin didn't feel the least bit irritated after I removed it. "Rubber masks are great for sensitive skin because they're not hard to get off and they don't pull at the skin," says Chang.

After I removed the mask, there wasn't one blackhead in sight, a rare feat for my complexion. My skin also felt crazy smooth—dare I say, smoother than it's ever felt before? Not only are these masks inexpensive (you can get a two-pack for $11), but they also make for one hell of a Snapchat story.

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