Aluminium and Felt Thermal Insoles, Cut to Size, CXS 36 to 50

  • -10%
Aluminium and Felt Thermal Insoles, Cut to Size, CXS 36 to 50
CA2900081
In stock: Ships within 48 hours
€4.41 TTC €4.90 -10%
Shipping 24/48 H
SELECT YOUR SIZE
  • 47/50
  • 36/46

Quantity Discount You Save
2 13% Up to €1.15
3 16% Up to €2.12
5 20% Up to €4.41
10 24% Up to €10.58
25 28% Up to €30.84
50 32% Up to €70.50
100 36% Up to €158.63
 

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SUMMARY

These insulating insoles slip into any boot or shoe to cut the cold coming up from the ground. They combine a fleece felt that holds still air with a layer of aluminium foil, over a polyethylene backing. Cut them to size along the pre-marked lines. Sizes 36 to 50.

TECHNICAL DESCRIPTION

Aluminium Thermal Insoles 36 to 50 — CXS

Protection Cold from the ground
Material Felt and foil
Sizes 36 to 50
Fitting Cut to size
Fleece felt and aluminium A layer between your foot and the cold ground

Fleece felt and aluminium foil, cut to the shape of your shoe

These insulating insoles are made to go into a boot or a shoe you already own, in place of the sockliner that came with it. They are built from 50% fleece felt and 50% aluminium foil, over an inner layer of polyethylene. Each pair carries pre-marked cutting lines, so you trim them to the exact shape of your own footwear with a pair of scissors. Two references cover the whole range: 36 to 46 and 47 to 50.

Grand-Froid expert's view

Most boots come with a thin factory sockliner that does nothing against the cold. Swapping it is the cheapest way to make winter footwear warmer, and the only one that works on the side the cold actually comes from — underneath.

What are they designed for?

They suit anyone who stands still on a cold surface, and any pair of boots that turns out to be less warm than expected.

  • Standing work on concrete: workshops, warehouses, loading bays, unheated premises
  • Cold rooms and the cold chain: where the floor never warms up all day
  • Standing still outdoors: fishing, wildlife watching, waiting, the touchline
  • Upgrading a boot you already own: in place of a thin sockliner that adds nothing
  • Driving plant and lorries: the metal cab floor stays freezing, and you never walk on it
  • Winter days out: a spare pair kept in the bag for the coldest days

How they work

Under the foot, the cold comes from contact with the ground. Standing on cold concrete, your body loses heat downwards without a break, and no jacket or sock will make that up.

The fleece felt does most of the work: its fibres hold still air, and it is that air that insulates. The aluminium foil adds a second effect, reflecting back part of the heat radiated downwards instead of letting it go into the floor. The polyethylene layer closes the underside and keeps ground moisture away from the felt, which would otherwise lose its effect.

Specifications & Composition
  • 50% fleece felt and 50% aluminium foil
  • Inner layer: polyethylene
  • Pre-marked cutting lines, to trim to the shape of your own footwear
  • Two references: sizes 36 to 46 and sizes 47 to 50
  • Sold by the pair
  • Designed for winter use
Choosing the size and cutting to shape

Order the reference that covers your size — 36 to 46 or 47 to 50 — then cut the insole down to your own footwear. Take the sockliner out of the boot, lay it on top of the new insole, and cut along the pre-marked line closest to its outline.

Cut a little wide rather than a little short: an insole that is slightly too big settles into the boot, whereas one that is too small slides about under the foot.

The trap of the too-tight boot. The most common winter mistake is to combine a thick wool sock and a thermal insole in a boot bought in a summer fit.

  • What happens: the inside is packed out, the insulating air disappears, and the foot ends up compressed
  • Why it backfires: a compressed foot gets less blood flow, and it is the blood that carries warmth to the toes
  • The rule: you should be able to wiggle your toes once the insole is in. If you cannot, keep these insoles for a pair you have room in
Care & Durability
  • Take them out of the boot in the evening and leave them to dry flat in open air
  • Dry away from a radiator or a stove: direct heat damages the foil and the felt behind it
  • Wipe them with a damp cloth if needed, then let them dry fully before putting them back
  • No washing machine and no tumble drying: the agitation and the hot water lift the foil away from the felt
  • Replace them once the felt has flattened out: a compressed felt no longer holds air, and no longer insulates
Return or exchange — 30 days
You have 30 days after receipt to request a return or exchange for this item. Insoles that have been cut can no longer be returned.

Why choose these thermal insoles?

Because they work on the one side of the foot that most winter kit ignores. Socks, boots and jackets all deal with the air around you; the ground is a different problem, and it is the one you are in contact with all day long. For the price of a pair of socks, they make a boot you already own noticeably warmer.

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