CAFFREY Subzero box with the charcoal felt face and speckled underside of the thermal insoles
Illustration: Keep the cold beneath your feet. Thermal comfort inside your winter boots.
Illustration: A softer side to cold days. Velvet comfort against your foot.
Illustration: Built to help hold warmth. Velvet, felt and aluminium foil insulation.
Illustration: Comfort above. Insulation below. A velvet surface and thermal construction.
Illustration: Make cold-weather steps feel warmer. A thermal layer beneath your foot.
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CAFFREY

Subzero Thermal felt insoles

Thermal felt insoles

$19.95 CAD
Size

Free shipping on orders over $50 · Questions? info@caffrey.ca

Refund policy

Soft felt comfortThermal insulationLayered cushioning

Winter comfort. Built in layers.

Exploded illustration of Subzero with a charcoal felt surface, cushioning layer, dense felt base and thermal foil backing

Premium felt surface

  • Velvety soft felt against your feet.
  • Full-length comfort, from heel to toe.
  • A smooth finish for everyday wear.
Subzero insoles showing the fine charcoal felt surface and textured speckled backing

Fine felt. A softer step.

A close, even felt surface brings soft comfort to your winter routine. Beneath it, the layered construction adds cushioning and insulation in a slim, full-length shape.

Comfort for your winter footwear.

Cutaway illustration of a winter boot with the charcoal Subzero insole and a soft warmth glow inside

Winter boots

Cutaway illustration of a casual leather boot with the Subzero insole fitted inside

Casual boots

Cutaway illustration of an everyday shoe with the thin felt Subzero insole inside

Everyday shoes

Subzero vs a basic liner

Exploded illustration of Subzero with a charcoal felt surface, cushioning layer, dense felt base and thermal foil backing
Subzero
A simple foam shoe liner used to illustrate a basic single-layer construction
Basic foam liner
FeatureSubzeroBasic foam liner
SurfaceFine charcoal feltPlain foam
WarmthFelt + thermal foilSingle foam layer
FeelLayered cushioningBasic padding

Product details

Made for winter walks and everyday outdoor routines, CAFFREY Subzero combines a velvety soft premium felt surface, two additional felt layers and an aluminium base. The layered construction brings cushioned comfort and insulation to boots and shoes, helping keep warmth underfoot through cold days.

Premium felt. Layered comfort.

The fine felt footbed feels smooth and soft against your feet. Two further felt layers add cushioning beneath the surface, creating a comfortable foundation from heel to toe. Quality felt and a layered construction are designed for lasting everyday wear.

Insulation beneath your feet

Three felt layers help hold warmth inside your footwear. An aluminium base adds a barrier against the cold coming through the sole, helping reduce heat loss toward the ground.

Product specifications

Surface
Velvety soft premium charcoal felt
Construction
Three felt layers with an aluminium base
Underside
Textured, speckled grey finish
Profile
Slim, full-length insole
Footwear
Winter boots, casual boots and everyday shoes
Sizes
EU 36–46 · US/Canada M 4–14. W 6–10 corresponds to M 4–8.
In the box
One pair of Subzero thermal insoles in your selected size

FAQs

What makes Subzero a winter insole?

Subzero combines a soft felt surface with layered cushioning and thermal foil insulation to help keep warmth underfoot in cold weather.

Which shoes can I wear them in?

Subzero works with winter boots, casual boots and everyday shoes that accommodate a full-length insole.

Which size should I choose?

Choose your size using the EU or US/Canada selector. Subzero covers EU 36–46, corresponding to US/Canada men’s 4–14. Women’s equivalents are shown where listed in the product size chart.

How does Subzero feel underfoot?

The fine felt surface feels soft and smooth, with cushioning beneath it. Its slim profile adds comfort without the raised shape of a structured arch-support insole.