OSEA x Benchmark for 4ocean
Introducing Ocean Renewal, turning ocean-powered spa treatments into meaningful travel moments with impact
Your Spa Treatment Supports Ocean Restoration
When you experience an OSEA Ocean Renewal treatment created exclusively for select Benchmark resorts in Florida, Bermuda, and Cape Cod, you're directly supporting efforts to preserve and protect the sea.
For every treatment booked, we'll contribute $25 to 4ocean, equaling 25 pounds of plastic and trash removed from oceans, rivers, and coastlines.
Explore the resorts where you can experience the healing power of the sea while making a meaningful impact on our planet.
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OSEA: Skincare From the Sea
OSEA's clean, seaweed-powered skincare and ocean-rooted approach bring the restorative benefits of the ocean directly into our Benchmark Resorts & Hotels spas. Founded in Malibu, California and inspired by a strong belief in the healing power of the sea, OSEA sets the standard for clean beauty with effective, seaweed-powered skincare. Sustainable from the start, OSEA is Climate Label Certified through the Change Climate Project and invests in coastal restoration projects that sequester carbon from the atmosphere. Every decision and every product they make considers the impact on our planet and collective wellbeing.
Your Impact
Over 10 million tons of plastic enter the ocean each year. But you have the power to help change that story when you travel with Benchmark Resorts & Hotels. In 2025, we helped 4ocean remove over 10,000 pounds of plastic and trash from global waterways—help us continue to build real change.
Ocean Renewal Body Ritual
This limited-edition body ritual blends mineral-rich sea salts with potent seaweed and active botanicals to smooth, visibly firm and replenish the skin. The experience begins with a full-body exfoliation using pink Himalayan and red Hawaiian sea salts to refine and energize, followed by a firming seaweed body mask infused with ceramides, niacinamide, aloe vera and amino acids to deeply condition and restore. A grounding, full-body application of seaweed-infused oils including passion fruit and açai, melts away tension, leaving you restored, radiant and relaxed.
Ocean Renewal Facial
This exclusive facial treatment blends potent seaweed extracts with active botanicals to hydrate, smooth and revitalize skin. The experience begins with OSEA’s signature calming, craniosacral therapy–inspired touch and a custom cleanse, followed by an infusion of sea minerals and hyaluronic acid for a refreshed, healthy-looking glow. A therapeutic neck, shoulder and hand massage leaves you tension-free and glowing.
Get Inspired
Read stories by expert travel writers on Mosaic Traveler
The Adventurist
5 Minutes With the Founder of 4ocean
written by Katie Jackson, a Montana-based freelance writer whose work has been published by Conde Nast Traveler, Travel & Leisure, The Sunday…
Northeast
These Hotels Are Making it Easy to Help Clean the Ocean
written by Angela Caraway-Carlton, freelance travel writer and regular contributor to The Miami Herald, Southern Boating & Yachting, Time Out…
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My OSEA Spa Experience at Costa d’Este Beach Resort
Costa d’Este is one of five Benchmark Resorts & Hotels properties that are partnering with OSEA for exclusive facial and body treatments that…