Round Lab Birch Moisturizing Cleanser: What to Know Before You Buy

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A cleanser is the one step almost every routine shares, which makes it a sensible first Round Lab product to look at. The Birch Moisturizing Cleanser is a foam cleanser from Round Lab's Birch line, the line the brand builds around moisture. Here is what Round Lab's product page says about it, where it slots into a routine, and what to check before ordering.

What Round Lab says about it

Round Lab calls this its "Unbeatable No.1 Foam Cleanser." According to Round Lab, it is a low-acid foaming cleanser that clears away hidden sebum and dead skin cells, with a soft, rich foam that removes impurities while leaving a moisture film behind.

Texture: water gel that lathers into foam
Scent: unscented
Skin types listed: dry, normal, combination, oily, sensitive and acne-prone
Size: 5.07 fl. oz (150ml)
pH: Round Lab describes it as a weak-acid cleanser that keeps a pH of 5-6

The key ingredient is birch tree sap (Betula Platyphylla Japonica Juice, listed at 10,000ppm). According to Round Lab, the sap contains 17 amino acids plus minerals, enzymes, proteins, antioxidants and vitamins. The brand also points to nature-derived coconut-based cleansing agents for removing impurities and helping with sebum control without leaving skin dry, and to "Vita Hyaluronic Acid" and NMF (natural moisturizing factor) for the moisture film. Other active ingredients named on the page include glycerin, hyaluronic acid, Artemisia annua extract, chamomile (Anthemis nobilis) flower oil, pine leaf oil, Quillaja saponaria bark extract and citric acid.

Where it fits in a routine

In a typical K-beauty order (cleanse → toner → serum → cream → sunscreen in the morning), this is the cleanse step. Round Lab's directions are simple: dispense an appropriate amount onto your palm, work it into a good lather, gently massage it over the whole face, then rinse thoroughly with lukewarm water.

If you wear sunscreen or makeup, many K-beauty routines use an oil or balm cleanser first in the evening and a foam cleanser like this second. Round Lab's page does not describe it as a makeup remover, so do not count on it to take off long-wear products on its own. After rinsing, a toner from the same brand, such as one from the 1025 Dokdo line Round Lab presents as its mild, basic range, is an easy next step if you want to stay within one brand.

Who it might suit

Round Lab lists every major skin type, including sensitive and acne-prone, so this is positioned as an everyday, all-rounder cleanser rather than a targeted treatment. It may appeal to people who:

want an unscented foam cleanser
like the idea of a cleanser that the brand says keeps skin feeling moist rather than squeaky
are building a first K-beauty routine and want a simple, low-cost starting point

For K-pop fans who keep hearing about Korean skincare in idol vlogs and want to try a Korean brand without a big spend, a cleanser is a low-commitment way in.

What to check before you buy

Price: listed at $14.45 on Round Lab's US store at the time of writing. Check the current price on the brand page, since it can change.
Shipping: check whether Round Lab ships to your country and what it costs before you order.
Ingredients: the full list is on the product page. It includes chamomile flower oil and pine leaf oil, so read it if you know you react to certain plant extracts or essential oils.
Patch test: even for products marked for sensitive skin, try a small amount on your jawline or inner arm for a few days first.

menthol, a POPORO CITY character, presenting a small unbranded tube at a bright bathroom shelf in morning light — Mood image: an AI-generated scene with menthol of POPORO CITY. It does not show this product.

Menthol's pick: Birch Moisturizing Cleanser — Pick card: an AI-generated POPORO CITY persona (fictional, has not used this product) with the official Round Lab product photo.

Our take

Based on Round Lab's own description, the Birch Moisturizing Cleanser is a straightforward, unscented, low-pH foam cleanser meant for every skin type, with birch sap and hyaluronic acid as the moisture story. At a 150ml size and a modest price, it is an easy product to slot into the first step of a routine, as long as the ingredient list works for your skin. We have not used it ourselves, so treat this as a summary of the brand's claims and check the product page for the latest details.

See the Birch Moisturizing Cleanser 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.