Cold weather base layer developed to sustain warmth and performance throughout trips of any duration. Thermal Base Layer T‑Shirt will trap heat and allow moisture to escape as vapor.

- Runntex Thermal Base Layer T‑Shirt fabric is made in Italy. This multidimensional stretch fabric provides compression and is woven with coffee-charcoal infused fibers making it naturally heat-retentive, bacterial and odor resistant. Thermal Base Layer T‑Shirt uses waste product from coffee production.

- Anti-chafe Thermal Base Layer T‑Shirt (thermal insulation, fast dry, moisture control, odor control, 4-way stretch) fabric from Italy.
- Next to skin fit.
- Strategically placed cooling zones.
- Exterior detachable care label so nothing rubs against your skin.

All our products come with a 1 year manufacturing warranty from the date of purchase. This guarantee includes faults in the fabric, workmanship and other manufacturing related errors. The warranty does not cover defects caused by normal wear and tear. Our warranty covers products purchased through satisfyrunning.com and authorized retail partners. If you have a warranty claim, please contact us here.