Technical by Nature.

We traded petroleum-based plastics for renewable performance. See the difference natural fibers make for your feet.

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High-Density Felted Wool

The Thermal Interface

We use multi-density felted wool for the top-sheet and support layers. Unlike synthetic foams that trap moisture, wool creates a breathable microclimate that naturally regulates temperature and neutralizes odor. In the ArchSupport, we vary the density of the wool to create an anatomical cradle that supports your foot without the "bottoming out" feel of plastic.

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Woven Structural Linen

The Torsional Core

Linen is our replacement for petroleum-based plastic shanks. On the LowProfile, a dual-layer linen construction (mid and bottom) provides a slim, high-tenacity foundation. For the ArchSupport, the linen serves as a rugged base layer, providing the necessary "snap" and structural integrity required for high-output days on the trail.

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Natural Saturated Latex

The Resilient Bond

We use natural latex as our primary bonding agent to fuse layers together without toxic adhesives. In our ArchSupport model, the arch layer is fully saturated with latex to add reinforced stability and "spring" that won't pack out. This creates a tacky, high-friction base that prevents the insole from sliding while maintaining enough flexibility for the "Taco Fold" installation.

Esker product photo front view

The "engine" of our supportive models. The wool arch layer is fully saturated with natural latex to add a resilient "snap" and reinforced stability that maintains its shape over hundreds of trail miles.

The primary interface for both models. Naturally antimicrobial fibres neutralize odour at the source, while our high-density spec provides active thermoregulation for "socks-optional" comfort in any climate.

Strategic wool layering creates the anatomical cradle. In the ArchSupport, these layers provide structured stability; in the LowProfile, they are streamlined to ensure maximum breathability without the bulk.

A 100% plastic-free fuse. Natural latex bonds every layer into a single unit and provides a tacky, high-friction base. This flexible construction allows for our signature "Taco Fold" installation and a custom trim-to-fit finish.

Our sustainable alternative to petroleum-based plastic shanks. This structural core provides the necessary torsional rigidity and longitudinal strength required for high-output mountain missions.

High-performance gear shouldn't outlast its welcome on the planet.

Designed to Return.

100% Biodegradable Foundations

Because we’ve eliminated petroleum-based plastics and toxic adhesives, an Esker insole is almost entirely biodegradable. At the end of its long life, the felted wool, woven linen, and natural latex can be composted, breaking down naturally into organic matter rather than shedding microplastics into the soil.

Renewable by Nature

Our materials are harvested, not manufactured from oil. Wool is shorn annually from sheep, flax for our linen is a low-water-intensity crop, and our latex is tapped from living rubber trees. These are carbon-sequestering materials that regenerate with every season.

Minimalist Footprint

By sourcing high-quality natural fibres and skipping the heavy industrial processing required for synthetic foams, we significantly reduce the energy intensity of our production. We build for durability first, but we design for the end-of-life second.

"When they finally wear out, your Eskers can go back to the garden—not the landfill."

Trade plastic for performance