Leave-In Hair Conditioner - Full Size 6oz
Leave-In Hair Conditioner - Full Size 6oz
Our Leave-In Hair Conditioner helps bring back softness and shine after sun and salt water with an antioxidant blend, keratin and B-vitamins. Apply before you swim to help coat strands and reduce breakage like an invisible swim cap. Formulated for You and Our Blue Planet.
- Pre-swim and post-swim
- Reef Safer™ - Tested & proven
- Biodegradable & USDA Biobased
- UV, heat & color protectant

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Reef-Safer™
USDA BioBased
Biodegradable in freshwater and saltwater
Antioxidant Blend
PCR Packaging
Collapsible content
Key Ingredients
- Hydrolyzed Keratin: Reinforces the hair shaft from inside out, reducing split ends and restoring that post-beach softness.
- Panthenol (Provitamin B5): Locks in moisture and amplifies shine while smoothing the cuticle layer for that just-conditioned feel.
- UV, Heat & Color Protector
- Organic Antioxidant Blend: A blend of organic Olive Leaf, Green Tea, Wakame, and Tulsi works to soothe, replenish, and lock in moisture — leaving skin calm, comfortable, and nourished.
Ingredients
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, Cinnami dopropyltrimonium 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
Usage
Rinse with fresh water if available, then apply to damp hair and finger comb to distribute evenly. Do not rinse.
Size / Volume
6 fl. oz. | 180 ml
Love it or Return It
We stand behind every product we make. If you're not completely satisfied, return it within 60 days for a full refund — even if the bottle is empty.
No questions, no hassle. Contact us to start a return.
Skin-First. Science-Backed.
Pre-swim and post-swim
Apply before swimming to coat and protect strands from sun, chlorine and salt, then use after to restore softness and shine.
Reef-Safer™ Formulation
Formulated for You and Our Blue Planet, with antioxidants, keratin, and B-vitamins that work whether you're diving or just swimming laps.
UV, Heat & Color Protection
Guard against sun damage, heat styling, and color fading with our antioxidant-rich blend.
Biodegradable & USDA Certified Biobased
Breaks down naturally in fresh and salt water and soil without leaving residue behind.
Complete Your Routine
Active Shampoo & Bodywash
Cleanse, condition and care for hair and skin in one step.
Leave-In Hair Conditioner - Full Size 6oz
You and your hair can both love the water with our leave-in conditioner.
Active Body Lotion
Leaves skin feeling silky-soft and replenished
Made for Our Blue Planet
Reef Safe™
Reef Safer™
Formulated for You and Our Blue Planet
Sustainable packaging
Our packaging is made to be as sustainable as the products inside it.
USDA Biobased
Certifies that our products are made from renewable biobased materials.
What's inside
✕Never inside
- ×Nano particles
- ×Parabens or phthalates
- ×Synthetic fragrance
- ×SLS/SLES
✔Always inside
- ✔USDA Biobased certified ingredients
- ✔Organic antioxidant blend for skin support
- ✔Formulated for You and Our Blue Planet
- ✔EcoConscious packaging
Testing data
It is important to know that just because a product is biodegradable for example, a biodegradable sunscreen, does not mean that it is non-toxic. There are several tests to measure a product’s biodegradability, and most are designed to analyze the product’s ability to breakdown in wastewater treatment facilities. To be considered ‘readily biodegradable’, the product must break down into its natural state from 60-80% in 28 days. ‘Inherently biodegradable’ means it will break down from as low as 20% to 60% in 28 days. So if a product says it is ‘biodegradable’, that is a good first step to knowing that the company is looking at its product’s environmental breakdown. However, it’s important to understand that you cannot measure a product’s safety just by looking at its ability to biodegrade. That said, it was important for us to know that our products would, in fact, biodegrade in their natural environments, so we tested in both fresh water, as well as salt water.
View All Testing Results
Formulated for You and Our Blue Planet.
Tested in the Field
★★★★★ 5/5 Stars
Excellent Leave-In Conditioner for Swimmers and Divers!
Stream2Sea Leave-In Hair Conditioner is a great addition to my swimming and scuba diving routine. I appreciate that the product is designed with both hair care and environmental responsibility in mind.
It’s convenient and easy to use, especially after spending time in chlorinated pools or saltwater. I also appreciate Stream2Sea’s commitment to creating products with marine environments in mind.
For anyone who spends a lot of time in the water and wants a practical, environmentally conscious hair care option, this conditioner is definitely worth considering. Great product from a brand with a mission I can support!
Love this leave in conditioner! Perfect after a snorkle. My hair is so soft and smells like a tropical beach!!!
Used it at the beach this past weekend and I don’t end up with any of those obnoxious salt water tangles. I loved the feel of the conditioner. Works great! Also they left a cute hand-drawn heart on my invoice and information about the product and company. This was a nice touch.
Like the way it makes my hair soft
I love how my hair looks and feels with this product. I spend time in a pool almost every day and my ends feel so soft!
- 5 stars: 404 (96%)
- 4 stars: 15 (4%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
★★★★★ 5/5 Stars
Excellent Leave-In Conditioner for Swimmers and Divers!
Stream2Sea Leave-In Hair Conditioner is a great addition to my swimming and scuba diving routine. I appreciate that the product is designed with both hair care and environmental responsibility in mind.
It’s convenient and easy to use, especially after spending time in chlorinated pools or saltwater. I also appreciate Stream2Sea’s commitment to creating products with marine environments in mind.
For anyone who spends a lot of time in the water and wants a practical, environmentally conscious hair care option, this conditioner is definitely worth considering. Great product from a brand with a mission I can support!
Love this leave in conditioner! Perfect after a snorkle. My hair is so soft and smells like a tropical beach!!!
Used it at the beach this past weekend and I don’t end up with any of those obnoxious salt water tangles. I loved the feel of the conditioner. Works great! Also they left a cute hand-drawn heart on my invoice and information about the product and company. This was a nice touch.
When doing four dives a day, there are four Stream2Sea products I never leave home without. One of those four is my leave-in conditioner. I wash my hair in the morning with my S2S shampoo bar & follow up with the leave-in conditioner to keep my hair silky smooth despite 4+ hours submerged in salt water. One of my favorite products!
I learned about this product before any other stream 2 sea product and that's what made me fall in love with this product! My thin hair gets into knots the second it touches water and this is the only thing that stops that!
I have long blonde hair and am a fairly avid surfer. I had been struggling with my hair not only being super dry, but also getting yellowish/brassy from the saltwater. I had tried a few different leave-in solutions, but this one is by far the best!! I am so happy with this product and the protection it provides. I also love that it is reef-safe and eco-friendly. My hair feels nourished and silky and I no longer feel like I have to cut it to keep it healthy. Will happily be repurchasing this :)
A pea-sized amount of this leave in conditioner goes a long way! I recently used it after diving with my wavy hair and didn’t dread combing out my hair after a shower. It’s a must have for home and while traveling.
I scuba dive all of the time, this leave in conditioner literally Mel s the ocean salt right out of my hair…no fresh water after a dive, no problem!
Wow! My hair goes from white girl afro to manageable in seconds with such a small amount. I am so grateful I found this product, it saves my salt and wind damaged hair from being on the boat. Keeps split ends at bay and prevents tangles, keeping my hair maintenance easy.
Works well for short dives and when hair is pulled back after applying. I wish it stayed in longer without having to pull my hair back but overall a great product!
Good product, made my hair beautiful and shiny.
I’ve been using leave-in by S2S since I first saw it on a dive boat years ago. I started using it for after dives, then it became a go to for my growing straight dry ends after I shower at home. It’s a great conditioner not only for diving but for adding a little moisture after a busy workout week of hair washing. My hair is normal, straight with a little wave, and adding a little tinsel as the years go on.
I got this because my colorist said, "Sun is the enemy of your color." I put it in right away after swimming (I use a swim cap which doesn't keep my hair dry), then scrunch and air dry. I have menopause curly fine, thin hair and it dries curly without needing to diffuse dry it. Keeping track of my color changes with regular pics. Highly recommend this product on how good it is for my aging hair on its own.
Pretty impressed!! I bought this bc it was reef safe and I was going on a sailing trip where we snorkeled everyday. I put this in my hair before snorkeling and after washing and it really helped protect my hair. Will be purchasing for our next trip also!
This ecofriendly leave in conditioner is a must have! We use this every day - dive day or not! Florida does a number on your hair between salt and mask damage our hair depends on this we have it in every bag we travel with and can’t step foot on a boat without it! It really helps to stop hair from breaking if you put this in your hair after the shower and put it back in a braid or pony tail before your dive! Pictured: just 2 of the many bottles of this gold we have stashed within arms reach at all times
This SAVES your hair! AND saves the reefs! What else could you want?? If you scuba dive, swim (salt or chlorine) surf or spend anytime at the beach - you want this. My long and very chemically treated hair stays tangle free and healthy. I am an active water loving girl with long wavy hair (2b/c) that’s normally worn straight.Best routine is to wet hair using cold fresh water (seals cuticle), apply conditioner (protects) and then put it up. I find my hair does best if I use a top bun or pony with hair ties every inch or so. Braiding just tangles and stresses hair more imo. Comb out using the Wet brush. Can’t live without this, especially on liveaboards. I also apply it dry as it protects my hair before getting it wet. My colors will still get brassy or dull but not as quickly. I still have to use purple shampoo for blonde and blue for brunette as often as I usually do.Smell is fragrant but pleasing not too strong. Value is well - invaluable imo. Helps keep my hair soft. I have a bottle in my bathroom, travel bag, scuba bag, surf/beach bag and always bring enough to share.And for the win this business is a small and woman owned! Bougie and product snob approved!I’ve also used the sting relief, shimmer sunblock, mask defog (best defog there is) and can’t wait to try some of her other products. If you can - buy this at your local dive shop!I have the large bottle and use it to fill the smaller bottles. One thing she could improve on is make the smaller bottle openings a little larger or screw top to make refill process easier.
I have long, fine hair that tends to tangle, found this leave in conditioner at a dive shop two years ago, and finally found it again, sooo very happy!!
I standby this product! As a very active dive instructor, I did 68 dives in 60 days and used it daily this past summer. I use it to presaturate my hair before the dive and post dive as well. My hair is super fine and tangles easily. Without this product I would be sad. Even the guys with slightly longer hair said they loved it.
We have been using Stream to Sea sunscreen for years but really love the everyday mineral sunscreen, Rubs in a bit easier and
This is the best product ever! I use it every time I get out of the ocean and it leaves my hair soft and silky. I even started using it at home in Colorado due to its moisturizing abilities and I love that it is not impacting our inland waterways.
Wow wow wow!I use it after I shower on damp hair and my hair is silky smooth and shiny. It’s also easier to brush through and de tangles my hair. The smell is like an orange creamsicle. The cost of product for the amount you get is pretty awesome. My hair type is fine hair but a lot of it and it tangles quickly. This is a holy grail product.I’ll keep repurchasing this
I don't know how I've lived without this product for so long.Was heading out on a 30 day sailing trip around Florida. I needed a product that was safe for the ocean that wouldn't leave my hair feeling dry and brittle. I sifted through tons of reviews before stumbling onto Stream 2 Sea and decided to give it a try.Never did I imagine this would become my new favorite hair product.After swimming in the ocean, taking saltwater or freshwater baths on the boat, or after a rainstorm I would run Stream 2 Sea through my hair and comb it. When my hair dried it was soft, tame, not frizzy at all, no knots or tangles. My boyfriend said he'd never seen my hair so soft and nice.I normally have extremely thick, coarse, wavy uncontrollable hair (regardless of products).Now, using this leave in conditioner, my hair is soft and straight, natural looking and beautiful, shiny and not frizzy.I live in Florida on the beach and never again will I go without this product. I even use it in the shower at home now, as my expensive conditioners just do not compare. I've been looking for this product for 30 years.Don't waste any more time and money. This is it.
Like the way it makes my hair soft