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Round Lab Soybean Nourishing Sheet Mask (1 PC): A Simple Guide Before You Buy

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Round Lab Soybean Nourishing Sheet Mask
Product photo from Round Lab.

Sheet masks are one of the easiest ways to try a K-beauty brand without committing to a full-size bottle, and Round Lab's Soybean Nourishing Sheet Mask is sold as a single piece. If you have seen Round Lab on K-pop fans' shelfies or in Seoul drugstore hauls and want a low-cost first step, this is one of the smallest purchases in the brand's US catalog. Below is a plain summary of what Round Lab says about the mask, how it could slot into a routine, and the questions worth asking before you add it to your cart.

What Round Lab says about it

According to Round Lab, the mask combines two key ingredients: Black Soybean Extract and Adenosine. The brand describes this mixture as supplying "dense nourishment" to the skin with the aim of a firm-looking complexion. The product page lists these basics:

  • Format: one sheet mask (1 PC)
  • Size: 0.9 fl. oz (27 ml) of essence
  • Scent: unscented
  • Line: Round Lab's Soybean range

Round Lab sorts its products into ingredient-led lines, and the Soybean line is the one the brand connects with nourishment. That makes this mask a natural companion if you already use, or are curious about, other Soybean products such as the brand's soybean cleansing oil and cleanser.

Where it fits in a routine

A typical Korean-style routine runs cleanse → toner → serum → cream → sunscreen in the morning, with sunscreen left out at night. A sheet mask usually takes the place of the serum step, after cleansing and toner, on the evenings you choose to use one. Afterwards most people pat any leftover essence into the skin and then follow with their usual cream to seal things in. Always follow the directions printed on the pouch for how long to leave the sheet on; we are not repeating timing here because the full instructions were not in the product information we collected.

Because it is a single mask, it works well as a weekend reset, a pre-event treat, or something to pack for a long flight to a concert or fan meeting abroad.

Who it might suit

  • Anyone who wants to sample Round Lab before buying full-size products.
  • People who prefer unscented skincare, since the brand lists it as unscented.
  • Fans of the Soybean line who want a mask step that matches the rest of their routine.
  • Gift-givers putting together a small K-beauty bundle for a friend.

What to check before you buy

  • Ingredients: read the full ingredient list on Round Lab's page, especially if you have known sensitivities or a soy allergy.
  • Patch test: try a little essence on your inner arm or jawline first and wait to see how your skin responds.
  • Price and shipping: the mask is listed at $4.00 on Round Lab's US store at the time of writing. Check the current price on the brand page and whether Round Lab ships to your country, as shipping can cost more than a single mask.
  • Expectations: a sheet mask is part of a routine, not a fix. If you have an ongoing skin concern, talk to a dermatologist.
menthol, a POPORO CITY character, arranging skincare on a vanity shelf at night
Mood image: an AI-generated scene with menthol of POPORO CITY. It does not show this product.

Our take

At a few dollars, the Soybean Nourishing Sheet Mask is an easy way to meet Round Lab's Soybean line. Round Lab is clear about what is inside, Black Soybean Extract and Adenosine in 27 ml of unscented essence, and that clarity makes it easy to decide whether it suits you. Buy one to try, patch-test it, and see whether the Soybean line deserves a bigger spot on your shelf. We have not tested it ourselves, so treat this as a guide to what the brand says rather than a review.

See the Soybean Nourishing Sheet Mask at Round Lab →

Information is based on Round Lab's product page as collected by KPOPORO. Details can change; please confirm on the brand page before buying.