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Soft, strong hair. Before and after the water.
The best leave-in conditioner for swimmers. Apply before you get in to help coat strands and reduce breakage. Rinse and reapply after to restore softness and shine stripped by chlorine, salt, and sun. A keratin and antioxidant blend formulated to be safer for aquatic life.
- Use pre-swim to help coat and protect hair strands
- Restores softness and shine after chlorine, salt, and sun
- Keratin and B-vitamins help strengthen and smooth hair
- Light, non-greasy formula detangles and leaves hair manageable
- UV-absorbent to help protect hair color from the sun
- Formulated to be safer for aquatic life
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Love It or Return It guarantee · Ships from Florida
412 FIVE-STAR REVIEWSYour hair is in the water as much as you are
If you swim, surf, or dive regularly, you already feel the difference. Here's what's happening to your hair below the surface.
THE TANGLE AFTER EVERY DIVE
Saltwater and chlorine roughen the hair cuticle, turning manageable hair into a knotted mess after every session. Braids and buns help — but they don't fix the damage already done.
THE BRITTLENESS THAT BUILDS
Repeated chlorine and salt exposure strips natural oils and weakens the hair shaft over time. For women with long, thick, or color-treated hair, the toll is visible and hard to reverse.
THE CONDITIONER THAT HARMS THE WATER
Most leave-in conditioners weren't formulated with aquatic environments in mind. If you're diving, surfing, or swimming in natural water, that matters — and it means the product matters too.
BETTER
APPROACH.
Stream2Sea Leave-In Hair Conditioner works in two directions. Apply before you enter the water to help coat strands and reduce breakage from chlorine and salt exposure. Rinse with fresh water after, then reapply to damp hair to restore softness, detangle, and leave hair manageable. Keratin and panthenol help strengthen and smooth. An antioxidant blend of green tea, tulsi, wakame, and olive leaf helps defend against environmental damage. Light, non-greasy, and formulated to be safer for aquatic life.
Formulated by a diver who needed it herself
Every ingredient earns its place. A keratin-rich, antioxidant-packed formula designed for women who spend serious time in the water.
HYDROLYZED KERATIN
Keratin protein helps strengthen and smooth hair, reinforcing strands that have been repeatedly exposed to chlorine, salt, and sun.
PANTHENOL (PRO-VITAMIN B5)
A B-vitamin that penetrates the hair shaft to boost moisture and flexibility, helping reduce breakage during and after water exposure.
ANTIOXIDANT BOTANICAL BLEND
Organic green tea, tulsi, wakame seaweed, and olive leaf extracts help defend against environmental oxidative stress from sun, salt, and chlorine.
ALOE LEAF JUICE
Organic aloe provides a cooling, lightweight moisture base that helps restore softness without weighing hair down.
WAKAME SEAWEED BIOFERMENT
A fermented seaweed extract rich in minerals and amino acids, supporting scalp health and strand resilience from the root.
UV-ABSORBENT INGREDIENTS
Helps protect hair color from UV degradation — a meaningful benefit for women swimming outdoors in sun-heavy conditions.
FULL INGREDIENT LIST
Aqueous Extracts of Camellia Sinensis (Green Tea) Leaf*, Ocimum Tenuiflorum (Tulsi) Leaf*, Alaria Esculenta (Wakame Seaweed)* and Olea Europa (Olive) Leaf*, Aloe Barbadensis (Aloe) Leaf Juice*, Cetearyl Alcohol, Behentrimonium Chloride, Glycerin, Dimethiconol Panthenol, Hydrogenated Vegetable Oil, Cocodimonium Hydrolyzed Keratin, Caprylic/Capric Triglycerides, Cinnamiodopropyltrimonium Chloride, Undaria Pinnatifida (Wakame Seaweed) Bioferment, Lactobacillus/Olea Europaea (Olive) Leaf Ferment, Hydrolyzed Keratin Protein, Sodium Levulinate, Potassium Sorbate, Tocopherol, Panthenol, Parfum (Naturally Derived), Limonene, Citronellol, Hexyl Cinnamal, Linalool. *ORGANIC INGREDIENTS
One bottle. A full season of protection.
One of Stream2Sea's most-loved products — worn on every dive boat, at every pool, and on every surf trip.
The only swimmer's conditioner designed to protect before and restore after — not just one or the other.
Made without oxybenzone, octinoxate, parabens, or other ingredients of concern. Naturally derived fragrance.
*Estimates. Actual usage depends on hair length and application amount. Best results when paired with Stream2Sea Conditioning Shampoo and Body Wash.
How to use it
PRE-SWIM: PROTECT
Rinse hair with fresh water if available, then apply Leave-In Conditioner to damp hair. Finger-comb to distribute, then braid, bun, or leave loose before entering the water.
POST-SWIM: RINSE
After your session, rinse with fresh water to remove chlorine, salt, and sand. For best results, follow with Stream2Sea Conditioning Shampoo and Body Wash.
RE-APPLY: RESTORE
Apply a second round of Leave-In Conditioner to damp post-wash hair. Finger-comb evenly and leave in. No rinsing needed — your hair will thank you.
Real women. Real water. Real results.
"A MUST FOR EVERY DIVE TRIP"
Started using the leave-in conditioner after a recommendation from one of the ladies on a dive boat somewhere in the Caribbean. It's been with me on every trip since. If you get in the ocean, you'll love this stuff!
"NO MORE RATS NESTS AFTER DIVING"
My hair gets so ratted up when I dive. I've tried all kinds of ways to tie it up — the best method to keep my hair from getting destroyed is this leave-in conditioner. After I'm done diving it's been very easy to brush out. This has been a life saver.
"MERMAID HAIR — FINALLY"
I have long blonde hair and am a fairly avid surfer. I had been struggling with my hair being super dry and yellowish from the saltwater. This one is by far the best. My hair feels nourished and silky and I no longer feel like I have to cut it to keep it healthy.
"PERFECT CONDITIONER FOR OCEAN SWIMMERS"
This is by far the best leave-in conditioner that is reef safe, smells fantastic, and leaves your hair silky smooth after a day in the ocean. A must have item after scuba diving. 10/10.
"Like many female divers, I have thick, curly hair that was always a tangled mess after diving. As a diver and a cosmetic chemist, formulating an effective, yet environmentally safe leave-in conditioner was a top priority when I started Stream2Sea. I needed a strengthening, non-greasy conditioner that doesn't weigh down even thin, fine hair — but still holds up to a day of masks and hoods in saltwater. This is that conditioner."
Love It or Return It
We believe in our products, and we believe in your peace of mind. If you don't love it, send us an email at hello@stream2sea.com and we'll make it right. That's our ocean-safe promise.
Frequently asked questions
How do I use this as a pre-swim conditioner?
Apply to damp hair before entering the water. Finger-comb to distribute evenly, then style as usual before your swim, dive, or surf session. The conditioner helps coat strands and can reduce breakage from chlorine and salt exposure during your time in the water.
How do I use it as a post-swim leave-in conditioner?
After your session, rinse hair with fresh water, then wash with Stream2Sea Conditioning Shampoo if available. Apply Leave-In Conditioner to damp hair, finger-comb to distribute evenly, and leave in without rinsing. It detangles, restores softness, and leaves hair manageable.
Is this safe to wear in the ocean or reef environments?
Yes. Stream2Sea Leave-In Hair Conditioner is formulated to be safer for aquatic life. It does not contain oxybenzone, octinoxate, parabens, or other ingredients of concern commonly found in personal care products. We formulate with ocean environments in mind because that's where our advocates spend their time.
Will this weigh down fine or thin hair?
It's formulated to be lightweight and non-greasy, so it works across hair types — including fine and thin hair. The keratin and panthenol give you strengthening benefits without the heaviness of silicone-based conditioners. Start with a small amount and add more if needed.
Can I use this on color-treated hair?
Yes, and the UV-absorbent ingredients make it a particularly good option for color-treated hair exposed to sun and outdoor swimming conditions. UV degradation is one of the primary causes of color fading, and this formula includes ingredients that help defend against it.
What's the difference between the 6oz and the 32oz refill?
The 6oz is the full-size bottle — ideal for travel, gym bags, or dive kits. The 32oz is a refill jug, best for advocates who use the product regularly and want the best per-ounce value. Refill your original bottle and reduce packaging waste.
What products should I pair this with?
For the best results, Stream2Sea recommends pairing the Leave-In Conditioner with our Conditioning Shampoo and Body Wash. Together they make a complete pre- and post-swim hair care routine designed to clean, condition, and protect hair for regular water people.
Protect it before. Restore it after.
Join thousands of women swimmers, divers, and surfers who've made it a non-negotiable part of every water session.
GET THE LEAVE-IN CONDITIONER$18.95 · 6 fl. oz. · Love It or Return It guarantee