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Heavy insulation that adds a layer of warmth to light shells and winter jackets alike. Stows in a pocket when the weather warms mid-ride.
We designed the Thermobooster to mirror that of a long-sleeve jersey-complete with a full-length zipper and front stash pocket that doubles as a storage pouch-creating a versatile mid layer that boosts thermal insulation around your core and arms, yet disappears in a rear pocket if need be. In fact, we've added a dedicated Thermobooster storage sleeve into the johDah Winter Jacket for this exact reason, allowing you to enter your winter training missions fully prepared for fluctuating weather and drastic changes in elevation. Layered directly above your Skin Layer, the Thermobooster traps body heat, breathes, and expels excess moisture using our OSMOS Heavy textile. This is the thickest of our brushed-back fabrics, featuring a stretchy warp-knit composition that smoothly wraps your torso and arms for a full-on fortress against the cold. The raw-cut hem and reversed zipper smoothly integrate with layers above and below, ensuring your complete outfit system remains as streamlined as possible.
THE FINER DETAILS
FEATURED FABRICS
This layer’s OSMOS Heavy material is our warmest insulator, the same as featured in our S9 winter jackets and tights. It combines stretch, a soft inner face, brushed insulation, and breathability to ensure dry warmth. The integrated face mask is made from OSMOS Light, less insulated and a better fit under a helmet.
CONSTRUCTION/FIT
Our raceFit provides a lightly compressive feel and easy layering, even under outer layers cut for aerodynamics.
ENGINEERING
Ramped Storage Pocket: An extra flap of material secures personal effects, and the pocket doubles as a compact storage pouch for the layer itself.
Raw-Cut Hem: Keeping a low profile is key to layering. The hem lies flat over base layers and under shells to ensure unwieldy bulk doesn’t dictate your strategy.
Heavy insulation that adds a layer of warmth to light shells and winter jackets alike. Stows in a pocket when the weather warms mid-ride.
We designed the Thermobooster to mirror that of a long-sleeve jersey-complete with a full-length zipper and front stash pocket that doubles as a storage pouch-creating a versatile mid layer that boosts thermal insulation around your core and arms, yet disappears in a rear pocket if need be. In fact, we've added a dedicated Thermobooster storage sleeve into the johDah Winter Jacket for this exact reason, allowing you to enter your winter training missions fully prepared for fluctuating weather and drastic changes in elevation. Layered directly above your Skin Layer, the Thermobooster traps body heat, breathes, and expels excess moisture using our OSMOS Heavy textile. This is the thickest of our brushed-back fabrics, featuring a stretchy warp-knit composition that smoothly wraps your torso and arms for a full-on fortress against the cold. The raw-cut hem and reversed zipper smoothly integrate with layers above and below, ensuring your complete outfit system remains as streamlined as possible.
THE FINER DETAILS
FEATURED FABRICS
This layer’s OSMOS Heavy material is our warmest insulator, the same as featured in our S9 winter jackets and tights. It combines stretch, a soft inner face, brushed insulation, and breathability to ensure dry warmth. The integrated face mask is made from OSMOS Light, less insulated and a better fit under a helmet.
CONSTRUCTION/FIT
Our raceFit provides a lightly compressive feel and easy layering, even under outer layers cut for aerodynamics.
ENGINEERING
Ramped Storage Pocket: An extra flap of material secures personal effects, and the pocket doubles as a compact storage pouch for the layer itself.
Raw-Cut Hem: Keeping a low profile is key to layering. The hem lies flat over base layers and under shells to ensure unwieldy bulk doesn’t dictate your strategy.
