RMK
RMK W Treatment Oil, 20ml
RMK W Treatment Oil, 20ml
@cosme rating: 5.4/7.0
RMK's skincare icon now available in trial size
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
Introducing a trial size of RMK's "Double-Effect" Treatment Oil, which offers a comprehensive approach to dryness, lack of firmness, and other skin problems. This 20mL size is recommended for first-time users. This pre-treatment oil combines an "oil layer" that softens skin with a "moisture layer" that replenishes the stratum corneum. Used at the beginning of your skincare routine, it prepares skin for subsequent moisturizers to penetrate the stratum corneum more easily. The dual action of oil-based and water-based ingredients provides a wrapping effect that prevents dryness and supports the skin's barrier function. It can also be used as a beauty oil or massage oil, promoting blood circulation*1 and firming skin. Formulated with moisturizing argan oil*2, its rich yet non-greasy texture and floral citrus scent, a blend of eight essential oils, including orange and neroli, gently envelop your skin. Formulated with two carefully selected moisturizing ingredients: "moisturizing ingredients" and "emollient ingredients." The "moisturizing ingredients" are blended with several botanical extracts to deliver moisture deep into the stratum corneum, while the "emollient ingredients" retain moisture and soften dry skin with the power of botanical oils. The perfect balance of oily and water-based ingredients protects skin from dryness. Massage with this smooth botanical oil, rich in the bounty of nature, for a smooth, natural massage. While checking your skin's condition with your palms, release tension and other stressful areas, leaving skin looking vibrant and radiant from within. Additionally, massage your entire face, focusing on the facial line, to stimulate lymphatic and blood circulation. This subtly improves circulation and leaves a refreshed appearance. The soothing floral citrus scent is a blend of eight carefully selected essential oils*, including orange and neroli, for a soothing feel. Enjoy your skincare routine while savoring the comfort and fragrance. *Contains orange, grapefruit, lemon, neroli, rose, jasmine, clove, and basil. Orange fruit extract, Rehmannia root extract*3, Phellodendron bark extract*4, royal jelly extract, Poria coccinea mushroom extract, Yuzu peel extract (all moisturizing ingredients), Licorice extract*5, Rosehip oil*6, Sage leaf extract, Olive fruit oil, Sugarcane-derived squalane*7, Jojoba oil, Grape seed oil, Avocado oil, Argan oil*2 (all emollient ingredients). *1 Promotes blood circulation through massage effect. *2 Argania spinosa kernel oil*3 Rehmannia root extract*4 Amaryllis bark extract*5 Licorice root extract*6 Rosa canina fruit oil*7 Squalane. A trial size of the skincare icon "W Treatment Oil" is now available in select stores.
Ingredients
How to use
As a pre-care routine, after washing your face or applying moisturizer, shake well and dispense 4-5 drops into your palm, then massage all over your face. Enjoy a relaxing, soothing, fragrant skincare routine. When massaging: After washing your face or applying moisturizer, shake the two-layered liquid up and down to blend it in, then dispense 4-5 drops (adjust the amount depending on your skin's dryness and personal preference) into your palm and massage all over your skin to blend the oil into your skin. *No need to rinse after massaging. (Illustration on the left: same as the actual product) 1. Massage the oil into your entire skin. Take the oil in your palm and massage it all over your face, enveloping you in the soothing fragrance. Apply to your neck, pressing into the hollows of your collarbone. (Illustration on the left: same as the actual product) 2. Forehead and around the eyes: Massage in a spiral motion from the center of your forehead toward your temples, pressing into your temples. For the eye area, lightly press the inner corner of the eye, then slide your fingers up and down towards the outer corner, and finally press the temples again. (Illustration on the left: same as the actual product) 3. Nose, mouth, and face line: Stroke the bridge of your nose from top to bottom, and massage the nostrils by moving your fingers up and down. For the mouth area, slide your fingers from the center to the corners of your mouth both above and below. For the face line, hold the product between your thumb and index finger and slide it up to your temples, lifting your chin. Enjoy your skincare routine while slowly savoring the comfort and fragrance.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.
Thinking it might be effective for inner dryness, I bought a small size to try it out. I'm planning to use it after a bath, but as soon as I put it on my hands, it gets absorbed right into my hands - amazing... So, if you want to use it on your face, it might be better to put a fairly large amount in your palm. Despite being an oil, it's not sticky (though I wouldn't say it's smooth), and it leaves your skin feeling bouncy after application. I'm layering lotion on top of this, but I wonder if I'm using it correctly. For now, I'd like to find a good way to use it. It would also work well if I mixed it with sunscreen or foundation, which are a little hard to spread.
I used to suffer from extremely dry skin in the winter, but since I started using this oil, I no longer have to worry about dryness. My skin absorbs lotion better at night, and applying it before makeup in the morning makes my skin look more radiant.
I have super dry skin, so adding oil makes it soft and moisturized, never drying out. It's also great that it's reasonably priced.
Just right for massage
I have super dry skin, so adding oil makes it soft and moisturized, never drying out. It's also great that it's reasonably priced.