Fourth Ray Beauty Rainfall 2% HA Serum dropper bottle standing upright, catching water splashes against a light-blue backdrop, showcasing its hydrating hyaluronic acid formula; ColourPop Face Serum, 0.95 fl oz/28 mL. Clear droplet of Rainfall 2% HA Serum showcases hyaluronic acid benefits - absorbs 1000x its weight in water, attracts and binds moisture, boosts softness, great for all skin types - on a light blue infographic; ColourPop Face Serum. Rainfall 2% HA Serum hydrating dropper bottle by Fourth Ray Beauty sits among dewy mist bottles on a blue-toned banner with water droplet graphics, promoting hyaluronic acid benefits; lightweight, fast-absorbing ColourPop Face Serum for deep hydration. Fourth Ray Beauty Rainfall 2% HA Serum bottle standing in a splash of water, dropper capped, highlighting lightweight, all-day hydration and works-under-makeup claims; ColourPop Face Serum with 2% hyaluronic acid, 0.95 fl oz/28 mL. Fourth Ray Beauty Rainfall 2% HA Serum dropper bottle beaded with condensation, set beside Waterfall gentle tonic, Dew It hydrating mist, and Soak It Up cream with cucumber slices on a misty blue backdrop - hydrating ColourPop Face Serum. Dropper bottle of Fourth Ray Beauty Rainfall 2% HA Face Serum standing upright, 1 fl oz/30 mL, on a light blue backdrop with water-drop graphics and benefit callouts; a hydrating ColourPop Face Serum with hyaluronic acid. Fourth Ray Beauty Remedy 10% Niacinamide Serum bottle, a pale yellow ColourPop Face Serum in a clear glass dropper, displayed as the Refine option beside hydrating, exfoliating, and brightening serums on a peach background.
Fourth Ray Beauty Rainfall 2% HA Serum dropper bottle standing upright, catching water splashes against a light-blue backdrop, showcasing its hydrating hyaluronic acid formula; ColourPop Face Serum, 0.95 fl oz/28 mL.
 Clear droplet of Rainfall 2% HA Serum showcases hyaluronic acid benefits - absorbs 1000x its weight in water, attracts and binds moisture, boosts softness, great for all skin types - on a light blue infographic; ColourPop Face Serum.
 Rainfall 2% HA Serum hydrating dropper bottle by Fourth Ray Beauty sits among dewy mist bottles on a blue-toned banner with water droplet graphics, promoting hyaluronic acid benefits; lightweight, fast-absorbing ColourPop Face Serum for deep hydration.
 Fourth Ray Beauty Rainfall 2% HA Serum bottle standing in a splash of water, dropper capped, highlighting lightweight, all-day hydration and works-under-makeup claims; ColourPop Face Serum with 2% hyaluronic acid, 0.95 fl oz/28 mL.
 Fourth Ray Beauty Rainfall 2% HA Serum dropper bottle beaded with condensation, set beside Waterfall gentle tonic, Dew It hydrating mist, and Soak It Up cream with cucumber slices on a misty blue backdrop - hydrating ColourPop Face Serum.
 Dropper bottle of Fourth Ray Beauty Rainfall 2% HA Face Serum standing upright, 1 fl oz/30 mL, on a light blue backdrop with water-drop graphics and benefit callouts; a hydrating ColourPop Face Serum with hyaluronic acid.
 Fourth Ray Beauty Remedy 10% Niacinamide Serum bottle, a pale yellow ColourPop Face Serum in a clear glass dropper, displayed as the Refine option beside hydrating, exfoliating, and brightening serums on a peach background.
Fourth Ray Beauty Rainfall 2% HA Serum dropper bottle standing upright, catching water splashes against a light-blue backdrop, showcasing its hydrating hyaluronic acid formula; ColourPop Face Serum, 0.95 fl oz/28 mL. Clear droplet of Rainfall 2% HA Serum showcases hyaluronic acid benefits - absorbs 1000x its weight in water, attracts and binds moisture, boosts softness, great for all skin types - on a light blue infographic; ColourPop Face Serum.
 Rainfall 2% HA Serum hydrating dropper bottle by Fourth Ray Beauty sits among dewy mist bottles on a blue-toned banner with water droplet graphics, promoting hyaluronic acid benefits; lightweight, fast-absorbing ColourPop Face Serum for deep hydration.
 Fourth Ray Beauty Rainfall 2% HA Serum bottle standing in a splash of water, dropper capped, highlighting lightweight, all-day hydration and works-under-makeup claims; ColourPop Face Serum with 2% hyaluronic acid, 0.95 fl oz/28 mL.
 Fourth Ray Beauty Rainfall 2% HA Serum dropper bottle beaded with condensation, set beside Waterfall gentle tonic, Dew It hydrating mist, and Soak It Up cream with cucumber slices on a misty blue backdrop - hydrating ColourPop Face Serum.
 Dropper bottle of Fourth Ray Beauty Rainfall 2% HA Face Serum standing upright, 1 fl oz/30 mL, on a light blue backdrop with water-drop graphics and benefit callouts; a hydrating ColourPop Face Serum with hyaluronic acid.
 Fourth Ray Beauty Remedy 10% Niacinamide Serum bottle, a pale yellow ColourPop Face Serum in a clear glass dropper, displayed as the Refine option beside hydrating, exfoliating, and brightening serums on a peach background.

Rainfall 2% HA Serum

Hydrating Face Serum

4.7
Rated 4.7 out of 5 stars
245 Reviews

25% Off. Discount Applied at Checkout

🌱 Vegan
🐰 Cruelty-free
🥼 Dermatologist tested
💧 Hydrating

review

4.7
Rated 4.7 out of 5 stars
Based on 245 reviews
Write a Review (Opens in a new window)
245 reviews
  • Marine L.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3/26/26
    Best serum ever. Period.

    My go-to serum. I have tried other hyaluronic acid serums but THIS ONE is the absolute best for me. Others make some sort of web on my skin that peels after, or are too sticky. This one is perfect. I can't live without it. I have a very VERY sensitive skin, with eczema and many allergies, and this Rainfall serum is life saving. Thank you Colourpop for selling this very hydrating serum !

    Was this helpful?
  • Calcium
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    11/29/25
    Moisturized my skin nicely

    Immediately you'll smell a cucumber earthy smell, works well after a good wash to the face♡

    Was this helpful?
  • Allison E.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8/18/25
    Rainfall

    Feels great on your face and does a good job moisturizing!

    Was this helpful?
  • Lillian E.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8/11/25
    I like this serum

    Love the texture and my skin stays hydrated

    Was this helpful?
  • Janaya J.
    Flag of United States
    Verified Buyer
    I do not recommend this product
    Rated 2 out of 5 stars
    6/20/25
    Rainfall + Night Dew is

    Rainfall + Night Dew is such a good night time combo

    Was this helpful?