An essential piece for cold-weather runs.
The Endurance Soft base layer combines warmth, lightness, and comfort.
Seamless technology: Absolute comfort, zero chafing, and a perfect fit that follows your every move.
Second-skin fit: Acts as an extension of your body for optimal thermal insulation and total freedom of movement.
New finer, softer yarn: Retains the same warmth while being lighter, for an unmatched feeling of lightness.
Double-layer high collar & raglan sleeves: Your shield against cold and wind, right where you need it most.
Integrated watch opening: Check your running data in a glance, without letting the cold in.
Reflective Circle logo: Stay visible and safe during low-light training.
Jacquard detail "Protect our playground": A signature finish that highlights your commitment.
Our yarns and material are GRS, Oeko Tex standard 100 and Italian TF traceability system certified. Knitted in Portugal.
All raw materials are meticulously sourced in Europe, and each product is crafted in Portugal.
Every Circle product is designed to blend high performance with a commitment to the planet, using sustainable (recycled and natural) and traceable materials.
With 100% of production in Europe, they're setting a new standard for a positive impact in the running industry.
Fairly Made traceability score is 5/5.
Circle proudly achieved B Corp certification in March 2024, with a score of 96.1.
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