★★★★★ 1
FLAT
Flat as a pancake. No support. No fluff. very incomfortable. Returning,
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Reviewed in the United States on May 1, 2026
COSRX The Vitamin C 23 Serum
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
COSRX The Vitamin C 23 SerumKey Benefits This serum contains 23% pure vitamin C (ascorbic acid), making it a powerful antioxidant treatment for brightening and anti aging. Its ideal for those with dull skin, uneven tone, or early signs of aging. Brightens Skin Tone: Fades dark spots, acne scars, and hyperpigmentation Reduces Fine Lines & Wrinkles: Stimulates collagen production for firmer skin Improves Elasticity: With super vitamin E (tocotrienol), which has 50x more
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Your COSRX The Vitamin C 23 Serum orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.7 ★★★★★
Based on 1791 reviews
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Product Reviews
★★★★★ 3
Get their newer version. These were too flat.
Really thin/flat pillows
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Reviewed in the United States on May 11, 2026
★★★★★ 2
Not great
I bought these pillows based on customer reviews. I got them and let them poof out after opening... But they are awful. They're soft but there's nothing to them. Very flat and not supportive. I'm literally buying different pillows tomorrow.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Excellent
Extremely comfortable pillows. I would highly recommend
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Pillows
I love the comfort and quality of the pillows.
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Reviewed in the United States on May 29, 2026
