Add to cart We're guided by a set of commitments we've chosen to hold ourselves to publicly, and a growing partnership network because transparency is key to any "sustainability" jargon. Below are our six pillars: the good, the getting-better, and the honest limits of where we are right now.
Radical Transparency
Radical Transparency
We pride ourselves in showing our work. Too many brands “gate-keep” their manufacturers, making it difficult to truly be traceable and sustainable in their practices in fear others will either copy them or expose their preposterous margins - for us this is the bare minimum. From materials sourcing to packaging, we document where our products come from and who makes them.
- Publishing full materials breakdowns (58% bio-based frames, ZEISS lenses with 50% carbon reduction)
- Partnering with top-tier manufacturers and pushing them on traceability
- Disclosing our packaging journey, not just our intentions
Traceable & Responsible Inputs
Traceable & Responsible Inputs
We only work with suppliers who can back up their sustainability claims transparently.
- Our ZEISS lenses are from their Sustainable polyamide line and have verified 50% reduction in carbon footprint from the production process.
- Our Frames, injected by Plastinax in Mauritiues are made of either Bio-based Grilamid TR90 frames (plant-derived, performance-proven) or 99% Nylon pellets from recycled fishing nets.
- Out tube packaging is chosen to have a lower environmental footprint due to it's weight, and ease for recycling and/or bio-degrading.
Circular Solutions
Circular Solutions
We have a goal of bringing together a community of like-minded anglers who together can help reduce fly-fishing-related waste by designing for second lives and closing the loop on line waste.
- Fly Line Recycling Program for shops and outfitters
- Exploring upcycled products made from reclaimed line and materials
- Investigating material re-entry loops with manufacturing partners
Community-Led Conservation
Community-Led Conservation
Change comes from the riverbank up. We listen first, prioritize acting locally, and co-create solutions with people who know their water best.
- Analyze: understand what's actually needed before we show up
- Align: find the right partners
- Activate: leverage our community, partnerships and storytelling to help local conservation grow
Optimism over Alarmism
Optimism over Alarmism
Anglers are part of the solution and we want to tell that story. Enough of the sustainability conversations these days make it seem like the world is ending. Although this may be true, but we need to rally behind the strong forces of action we can create together to motivate more positive changes.
- We're working on films and storytelling spotlighting restoration, not just loss
- Amplifying local conservation wins through guides, shops, and storytellers
Momentum over Perfection
Momentum over Perfection
We know the constraints we have to work within given the nature of growing a startup. We believe that momentum allows for perfection in the long-run and we plan to bring our community along for the ride.
- Sharing progress updates and product roadmaps openly
- Collaborating with NGOs to identify the highest-impact changes we can make
- Balancing performance, sustainability, and accessibility in every product decision
99/58
99% Recycled Fish Net Frames or 58 % Bio-based frame material used at Marble. Derived from castor bean oil and nets collected form the mediterranean — we’re engineered for durability, not greenwashing.
50%
Verified carbon reduction on ZEISS eco-lenses versus conventional production
100%
Packaging designed to be recycled or biodegradable. No virgin plastic in our boxes.
Our Fly Line Recycling Program
Fly line doesn't biodegrade and it ends up in rivers. We built a take back program for shops and outfitters to collect used fly line and keep it out of watersheds.
Learn About the Program
Are Marble frames actually sustainable?
We don't claim perfection — we claim transparency. Our frames are either 58% bio-based or 99% Recycled fishnet, our ZEISS lenses carry verified carbon reduction data, and our packaging is fully recycled or biodegradable.
What does bio-based frame material mean?
Our "bio-based" frames use Grilamid TR90, derived partly from castor bean oil. Same durability as conventional nylon but it has a traceable and lower environmental footprint.
What is the ZEISS eco-lens carbon reduction?
ZEISS eco-lenses are produced using a process that generates 50% less carbon than conventional ZEISS lens manufacturing. Independently documented.
How can I participate in the Fly Line Recycling Program?
The program is available through select shops and outfitters. Reach out directly or ask your local shop about setting up a collection point.