Isotherm: The Calculated Barrier.
Isotherm Philosophy
Engineered Isolation: From Commute to Summit. We created the Isotherm Series to solve the critical energy drain caused by thermal instability. In both demanding mountain stillness and unpredictable urban transitions, unnecessary heat loss diminishes performance and comfort. This collection provides a precise, regulated shield that functions across disparate environments. The high warmth-to-weight ratio makes it essential for rigorous layering, compressing down efficiently when moving, yet providing instant, reliable warmth when static. The Isotherm Series ensures your core temperature remains stabilized, allowing the gear to fluidly transition with your activity—from early morning urban commute to alpine camp setup—without compromising the integrity of your complete technical system. This is the Essential Defense against the cold.
A-T.L. Bond Material
The heart of the Isotherm Series is the proprietary A-T.L. Bond insulation. This material is not a simple batting; it is a thermal lattice engineered to stabilize and maximize trapped air volume. We achieved this by utilizing a calculated blend of micro-denier synthetic fibers, thermally bonded at precise intersections to prevent fiber migration and loft compression.This stability allows us to utilize the A-T.L. Bond across a precise thermal spectrum, ensuring optimal warmth-to-weight for any condition: A-T.L. 100 (Lightweight): Used in active pieces and mid-layers, offering high breathability and performance in temperatures down to 0C A-T.L. 200 (Mid-Weight): Our core insulation for static warmth, designed for reliable protection in sub-zero conditions, effective down to -15C A-T.L. 300 (High Loft): The maximum thermal configuration, utilizing an increased fiber density for deep cold, engineered for static use in environments below -25C. The result is an uninterrupted thermal barrier that maintains its integrity and warmth-to-weight ratio even when exposed to residual moisture, delivering predictable, static warmth where natural down insulation cannot.
Pallet
The Isotherm Series' color architecture is designed for maximum versatility and layering integration. We prioritize foundational neutral tones that ensure timeless relevance and effortless compatibility across your entire technical wardrobe. Our primary palette is anchored by three essential, low-saturation core colors: Dark Obsidian: A true black, serving as the essential utility tone for hardware and deep cold defense. Slate Grey: A classic, non-reflective neutral that integrates seamlessly into both urban and alpine environments. Abyssal Blue: A deep, rich blue selected for its ability to hide soiling and maintain visual integrity through heavy use. To meet necessary safety and visibility mandates, we include a high-contrast accent color: High-Vis Vector: A calculated, intense yellow-green used only for critical elements like external zippers and logo treatments. This ensures essential visual signature for safety without compromising the line's versatile, functional aesthetic. All colors are achieved using solution-dyed processes to dramatically reduce water consumption and improve the textile's long-term colorfastness, maintaining the garment's visual integrity throughout its extended life cycle.
Styles
The Isotherm Series is a complete wardrobe built around static warmth and layering adaptability, featuring tailored fits for both men and women across three essential garment types. 1. Core Insulation Jackets (A-T.L. 200 & 300) These are the foundation of your cold-weather defense. We offer calculated cuts to suit different levels of defense: The Anchor Jacket (Mid-Length): Our most popular piece, available in A-T.L. 200 (Core) for everyday cold. The mid-length cut provides extended coverage over the hips for maximum static warmth. Men’s Fit: Structured shoulder and torso mapping for shell compatibility. Women’s Fit: Articulated waist and slightly extended length for thermal defense and comfort. The Sentinel Hoody (Short-Cut): Designed in A-T.L. 300 (Maximum Loft). A shorter, helmet-compatible cut that prioritizes core warmth and mobility for mountaineering or belaying. 2. Mid-Layers & Vests (A-T.L. 100) These pieces are built for active regulation and maximum layering versatility under a heavier jacket or shell. The Traverse Vest (Unisex): A lightweight, sleeveless option utilizing A-T.L. 100. Perfect for core warmth retention while keeping the arms free for high-output activities. The Isotherm Pullover: A zippered mid-layer that uses the A-T.L. 100 fabric density to provide warmth without the commitment of a full jacket. Great for daily wear or as a fleece alternative. 3. Accessories & Lower Body Defense Because total defense requires integrity from head to toe, we've included essential thermal extensions: Insulated Pant (A-T.L. 100): A lightweight, side-zip pant for rapid deployment over base layers during breaks or static periods in deep cold. Thermal Mitts: Utilizing A-T.L. offcuts and HydroSeal fabric for packable hand protection. We ensure that every piece in your layering system—from your lightest mid-layer to your maximum loft jacket—locks together to create an uninterrupted thermal field.
Essential Features
The Isotherm Series is defined by its integrated, fail-safe components—where every detail is engineered to maximize thermal efficiency and environmental defense. Water-Deflection Shell (DWR): The face fabric utilizes a highly structured nylon or polyester with an aggressive DWR (Durable Water Repellent) finish, causing precipitation to bead and shed instantly. This prevents surface saturation, protecting the thermal integrity of the A-T.L. Bond insulation beneath. Continuous Baffle Mapping: Instead of traditional sewn-through seams (which create cold spots), our garments use strategically placed thermal baffles. This mapping ensures a continuous sheet of A-T.L. Bond insulation across the entire garment body, eliminating heat leakage points and optimizing loft stability. HydroSeal Zippers: All primary closures utilize low-profile, weather-resistant HydroSeal zippers. These highly durable components minimize thermal bridging and prevent moisture ingress, ensuring the critical zipper line remains an effective part of the defense system. Helmet-Compatible StormHood: The hood design is geometrically precise, integrating a three-point adjustment system that cinches seamlessly over or under a helmet. This maintains critical peripheral vision while locking out wind and trapping core heat around the neck and head. Micro-Pack Integration: Every piece is designed with internal architecture (often a designated pocket or stuff sack) allowing it to be compressed into a minimal volume. This Micro-Pack feature ensures the piece is easily carried and deployed, enabling rapid adaptation to changing thermal requirements.
Sustainability
Our commitment to sustainability touches every step of the product journey—from the materials we choose to the partners we work with. Materials: Prioritizing Renewed and Recycled: Recycled Fibers: Over 70% of our polyester and nylon fabrics are now made from post-consumer plastic bottles or repurposed industrial waste. This significantly reduces reliance on fossil fuels and diverts waste from landfills. Certified Organic: All our cotton is certified GOTS (Global Organic Textile Standard), ensuring it's grown without toxic pesticides or synthetic fertilizers, protecting the environment and the farmers. Ethical Manufacturing and Transparency: Fair Labor: We require all of our manufacturing partners to adhere to the Fair Labor Association (FLA) code of conduct. This guarantees fair wages, safe working conditions, and reasonable working hours. Water Management: We partner with dye-houses that utilize advanced closed-loop systems, allowing them to reuse up to 85% of their process water, minimizing water pollution and consumption. Packaging and Shipping: Minimalist Packaging: We ship all products in 100% compostable mailers and use recycled paper hang tags, completely eliminating single-use plastic from our direct-to-consumer packaging. Carbon Offset: We calculate the carbon footprint of every shipment and invest in verified carbon offset projects (such as reforestation and renewable energy) to neutralize the environmental impact of delivery.
When you're out there, whether it's navigating the city in January or finding stillness in the mountains, losing core heat is the enemy of performance. We designed the Isotherm Series to be the absolute, reliable solution for staying warm without the bulk. It's the technical answer to deep cold.