Fyrenza™ heated underwear
What You Get With This Heated Base Layer
28 Heating Zones
Cold tends to settle in the back, chest or limbs while you wait at a trailhead. Heating zones are spread across the back, chest, abdomen and limbs, so warmth is not limited to one spot.
Built-In Temperature Sensors
Fiddling with controls is a nuisance with gloves on. Built-in sensors read the weather and your effort level and adjust the output, so you can focus on the route instead of settings.
Moisture-Wicking Fleece
Climbing in a base layer gets sweaty, then you stop and feel damp. Soft fleece sits against your skin and pulls moisture away from it, so the layer suits active stretches and rest breaks.
Reinforced Stitching and Coating
Wiring inside clothing needs protection from daily wear on the trail. Strengthened stitching and a coating over the heating elements shield them, so you can pack it for winter trips.
Frequently Asked Questions
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Tracked ShippingTracked ShippingFyrenza: Heated Underwear as a Base Layer for Cold Days
Skiers, hikers and cyclists often stack extra winter layers to stay out in the cold, and the stack gets bulky under a jacket. Heated underwear takes another route: Fyrenza is a slim base layer with heating built into the fabric, and regular clothes go over it.
It has 28 heating zones across the back, chest, abdomen and limbs, and built-in sensors adjust the output for weather and activity. Moisture-wicking fleece sits against the skin, and stretch fabric moves with the body. This heated thermal underwear is unisex, so it works as men's heated underwear or women's heated underwear.
It connects to any standard power bank, not included, so the garment has no built-in battery. This heated underwear is machine washable once the power bank is disconnected. It also serves as heated long underwear and a heated base layer for skiing, hiking and cycling.
