Torriden's DIVE-IN Serum has been the number one selling serum in Korea for good reason, or so I kept reading. After seeing it recommended by what felt like every skincare creator on my feed, I ordered a bottle to see if it could compete with my existing hyaluronic acid serums. Spoiler: it didn't just compete. It became my new daily driver.
First Impressions
The packaging immediately stood out. The bottle is a sleek, transparent blue with clean typography and a dropper dispenser. It feels premium without being pretentious, like the kind of product that belongs on a well-curated shelf. The 50ml size is standard for a serum, though I found myself wishing it were larger given how quickly I went through it.
The serum itself is a clear, water-like liquid, extremely lightweight. No viscosity, no stickiness, no gel-like consistency. It flows freely from the dropper and feels like applying water to your face. There's virtually no scent. Maybe the faintest hint of something clean and aquatic, but I could be imagining that. For anyone who's been put off by thick, sticky hyaluronic acid serums, this texture is refreshing.
Key Ingredients Breakdown
5 Types of Hyaluronic Acid are the foundation of this formula. Rather than using a single molecular weight, Torriden uses a blend of different sizes: Hyaluronic Acid, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, and Sodium Acetylated Hyaluronate. The idea is that different molecular sizes penetrate different layers of the skin, larger molecules hydrate the surface, while smaller, low-molecular-weight forms reach deeper layers.
Panthenol (Vitamin B5) strengthens the skin barrier and promotes moisture retention. Allantoin soothes and calms irritated skin. Madecassoside is derived from centella asiatica and supports skin healing and reduces redness. The formula is free from fragrance, essential oils, alcohol, and parabens.
What separates this from a basic hyaluronic acid serum is the multi-weight approach. Most drugstore HA serums use one or two types, this uses five, which theoretically delivers hydration at multiple depths.
How I Used It
I applied 3-4 drops to damp skin immediately after cleansing, morning and evening. This is critical with hyaluronic acid products, applying to damp skin gives the HA something to grab onto and pull into the skin. Applying to dry skin can actually have the opposite effect, pulling moisture out.
I pressed it in with my palms rather than rubbing, then immediately followed with my moisturizer to seal everything in. In the morning, my routine was: cleanser, Torriden DIVE-IN, moisturizer with SPF. At night: double cleanse, Torriden DIVE-IN, treatment serum (retinol or vitamin C on alternating nights), moisturizer.
I also tested layering multiple applications, two layers of 3-4 drops each, on particularly dry days. The serum layered on itself beautifully without any stickiness or heaviness.
Results After 4 Weeks
This is one of the few products where I noticed a difference from the very first application. And the results only improved with consistent use.
Immediate effect: My skin looked plumper and felt noticeably hydrated within minutes of application. Not surface-level dewiness from product sitting on top, actual plumpness from within. The dry, crepey texture under my eyes improved visibly right away.
Week 1-2: My skin maintained hydration throughout the day better than with my previous HA serum. I noticed I was reaching for my face mist less often during afternoon slumps. My skin had a consistent, healthy glow that looked natural rather than product-induced.
Week 3-4: The cumulative effect was impressive. My skin texture was smoother overall. The fine dehydration lines on my forehead, the ones that appear when skin is dry rather than from aging, had softened significantly. My skin felt bouncy and resilient in a way it hadn't in months. Several people commented that my skin looked "really good" without being able to pinpoint exactly why.
What surprised me: This serum didn't cause the slight stickiness I've experienced with other HA products. My skin just felt like... healthy skin. Not coated, not tacky, just genuinely well-hydrated.
What it didn't do: It's a hydrating serum, not a treatment. It didn't fade dark spots, clear acne, or reduce wrinkles beyond what hydration naturally does. It's a supporting player, not the star, but it makes everything else in your routine work better.
Who Should (and Shouldn't) Use This
Great for: Every skin type, honestly. Dehydrated skin will see the most dramatic improvement. Oily skin types who need hydration without heaviness. Anyone who finds other HA serums too thick or sticky. Sensitive skin, the formula is extremely gentle. People in dry climates or air-conditioned environments. Perfect as a hydrating base before actives.
Maybe skip if: You're looking for a treatment product (anti-aging, brightening, acne-fighting), this is pure hydration. If you're already using a multi-weight HA serum you love, this may not offer enough of an upgrade to justify switching. The 50ml size runs out relatively quickly if you use it twice daily.
Pros and Cons
Pros
- Five types of hyaluronic acid for multi-layer hydration
- Water-light texture absorbs instantly with zero stickiness
- Noticeable plumping and hydration from first use
- Layers beautifully under all products, no pilling
- Free from fragrance, alcohol, and common irritants
- Elegant packaging with functional dropper
- Suitable for all skin types including very sensitive skin
Cons
- 50ml size feels small for the price, runs out fast with twice-daily use
- Pure hydration only, no additional treatment benefits
- Requires a moisturizer on top to seal in hydration
- Must be applied to damp skin for best results, which requires adjusting your routine
The Verdict
Rating: 4.5 / 5 Stars
The Torriden DIVE-IN Serum is, quite simply, the best hyaluronic acid serum I've used. The multi-weight HA approach delivers hydration that feels deeper and more lasting than single-HA formulas. The texture is perfect, weightless, non-sticky, instantly absorbed. My skin has been consistently plumper, smoother, and more resilient since I started using it.
The only thing keeping this from a perfect 5 is the size-to-value ratio. At 50ml, it runs out faster than I'd like, especially with twice-daily use. I'd happily pay more for a 100ml version. But that's ultimately a minor complaint about a product that has genuinely earned its reputation as Korea's top-selling serum.
Would I repurchase? Without question. Already on my second bottle.
Frequently Asked Questions
Is the Torriden DIVE-IN Serum good for oily skin?
Yes, this is one of the best hydrating serums for oily skin types. Its water-light texture absorbs instantly without leaving any oily or sticky residue. Properly hydrated oily skin often produces less excess sebum, so this serum can actually help balance oil production over time. It layers well under lightweight moisturizers and sunscreens without feeling heavy.
How is the Torriden DIVE-IN Serum different from other hyaluronic acid serums?
The key difference is the five-weight hyaluronic acid system. Most HA serums use one or two molecular weights. Torriden uses five different sizes, from large molecules that hydrate the surface to tiny low-molecular-weight forms that penetrate deeper layers. This multi-depth approach delivers more thorough hydration than single-HA formulas. The texture is also notably lighter and less sticky than many competitors.
Should I apply the Torriden DIVE-IN Serum on wet or dry skin?
Always apply to damp skin, this is important for any hyaluronic acid product. HA is a humectant that draws moisture from its surroundings. On damp skin, it pulls that surface water into your skin. On very dry skin in a dry environment, it can theoretically pull moisture from deeper skin layers instead. After cleansing, pat your face until it's damp (not dripping), apply the serum, then immediately follow with moisturizer.
Can I use the Torriden DIVE-IN Serum with retinol or vitamin C?
Absolutely. This serum is a hydrating support product with no active ingredients that would conflict with retinol or vitamin C. Apply the DIVE-IN Serum first on damp skin, let it absorb for a minute, then apply your retinol or vitamin C. The hydration layer can actually help buffer some of the drying or irritating effects of these actives, making them more tolerable for sensitive skin.







