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CALIBRATED
Support Insole — Calibrated Supply Co.
Measured 2026-07-18 · D.L.SKU CAL-GRD-IN1
groundFeet & Ground

Support Insole

Moulded footbed for a loaded boot

4.5 / 5561 reviews

The cheapest upgrade to any boot you already own. Compression set stayed under 8% after 400 km under a loaded pack.

$59.00

CAL-GRD-IN1 · USD

In stock

Sizes are confirmed by email before dispatch, so a wrong choice here costs nothing.

1
  • Standard shipping $8.95 · 3–5 business days. Free over $99.
  • 60-day returns. One-time purchase — no subscription and no recurring charge.
  • Weight, pair 96 g / 3.4 oz, measured 2026-07-18 on A&D EK-6100i, ±1 g. The same numbers are printed on the Field Card in the box.

Your card statement will show CALIBRATED SUPPLY for this order, not “Calibrated”. Questions? support@calibratedsupply.com · +1 (714) 269-7133.

Measured

How we measure
Weight, pair

96 g / 3.4 oz

US 10–11, trimmed to the marked line.

Arch height

31 mm

Mid arch, unloaded, measured on a flat bench.

Heel cup depth

18 mm

Compression set

Under 8% after 400 km

Thickness at the heel before and after, worn under a 20 kg pack.

Taken 2026-07-18 on A&D EK-6100i, ±1 g by D.L.. The same values are printed on the Field Card in your box, so the page and the carton can never disagree.

What it is made of

  • Moulded EVA baseDual density

    Firm through the arch, softer at the heel strike.

  • Nylon stiffener

    Under the arch only. A full-length stiffener fights a boot's own flex.

  • Merino-blend top sheet

    Wool face, so a sweaty boot smells like a boot and not a chemistry set.

The full description

Every boot ships with a flat die-cut foam insole that costs the maker about a dollar. Replacing it is the highest-return change you can make to a boot you already like, and it costs less than a sock drawer.

Dual-density EVA, firm through the arch and softer at the heel strike, with a nylon stiffener under the arch only. The compression figure is the one that matters — an insole that packs out in a month is worse than the one you took out.

Bought for

Any boot carrying a pack. Especially a boot that already fits.

Not for

Fixing a boot that does not fit. An insole cannot make a boot the wrong shape into the right one.

Field notes

  1. 01Pull your boot's original insole, lay it on top, trim to the marked line. Trim small; you cannot add it back.
  2. 02Give them two or three walks before a hunt. A new footbed changes where a boot touches your foot.
  3. 03If the arch is uncomfortable after a week rather than after a day, the size is wrong, not the arch.

In the box

  • One pair, untrimmed
  • Trim guide
  • Field Card

Construction, care and warranty

Construction
Dual-density moulded EVA base; nylon arch stiffener bonded under the midfoot; merino-blend brushed top sheet; open-cell heel pad.
Care
Pull them out to dry after a wet hunt. Hand wash in cold water, air dry away from heat.
Warranty
One year against delamination or the stiffener breaking through.
Bought for
Western, Upland, Late season
SKU
CAL-GRD-IN1
Price
$59.00 USD

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