Cooling Vest

1. 01

   Check the size while dry

   Measure the chest and try the vest on before soaking it. Vest sizes differ from shirt sizes, and a size exchange is only accepted for a vest that has not been worn or soaked.

2. 02

   Soak until the pockets are firm

   Submerge the vest in water for 5–15 minutes (the maker's pages give 5–10, 10 and 10–15 minutes). The crystals swell into gel; the pockets should be firm but not bursting.

3. 
   03

   Wring, wipe and hang to dry

   Twist gently to remove excess water and wipe inside and out with a towel; a little gel may seep out at first. Hang the vest until the fabric is completely dry.

4. 04

   Chill it

   Freeze for at least 2 hours, out of the plastic bag it came in, or chill it in ice water (see the table below). If the frozen pockets are stiff, bend them with your fingers to loosen them.

5. 05

   Wear it, then chill it again

   The closer to the skin, the stronger the cooling. When the cold runs out, put the vest back in the freezer; let frozen-together fabric thaw rather than pulling it apart.

6. 06

   Re-soak when the pockets flatten

   Over time the gel dries and the pockets flatten; soak the vest again for 5–10 minutes. For long storage, let it dry back to crystals and hang it in a ventilated place.

• Freezer

  How

  At least 2 hours, not in the supplied plastic bag

  Stays cold

  Up to 2 hours

  Maker's notes

  Gives the longest continuous cooling

• Ice-water slurry

  How

  Soak the vest directly for 1–3 minutes, or put it in a resealable bag in the slurry

  Stays cold

  Up to 30 minutes (direct soak)

  Maker's notes

  Towel-dry before wearing

• Fridge

  How

  A short chill only

  Stays cold

  Not stated

  Maker's notes

  Never store it in the fridge: mould may form

• Microwave (warm use)

  How

  30-second intervals until warm enough; times vary with wattage

  Stays cold

  Not stated

  Maker's notes

  Check it is not too hot before wearing, to avoid burns

Two vests used in turn, one in the freezer while the other is worn, give up to 4 hours of continuous cooling (maker's figure for its blue-and-white pair).

• Frozen overnight, on bare skin

  Best reading

  About 16–17 °C

  Average, 1st wear

  9.7 °C

  Average, 2nd wear

  6.4 °C

• Frozen overnight, over a football jersey

  Best reading

  About 11–12 °C

  Average, 1st wear

  6.5 °C

  Average, 2nd wear

  3.8 °C

• 5–10 minutes in ice water, on bare skin

  Best reading

  About 9 °C

  Average, 1st wear

  7.3 °C

  Average, 2nd wear

  5.5 °C

• Jersey only, no vest

  Best reading

  –

  Average, 1st wear

  2.7 °C

  Average, 2nd wear

  2.5 °C

Drop in skin temperature under the vest. CSIRO Textile and Fibre Technology, May 2001: 4 people jogged in the vest for 10 minutes at 25 °C and 50% relative humidity, then ran for 20 minutes without it, twice; probes on back, chest and abdomen. The vest then had four 30 mm gel pockets front and back. The report was on the maker's former website (archived copy, 2013).

• 

  Activation Video

  Shane Williams · 1:47 · English

  Plays from YouTube once started. Open on YouTube

Key specs

Sleeveless front-zip vest in 100% polyester (interlock inner, micromesh outer) with non-toxic polymer crystal sewn into 4 bands on the front and 3 across the upper back, none over the kidneys. Soak in water for 5–15 minutes (the maker's pages differ), dry, then freeze for at least 2 hours or chill in ice water. 0.8–1 kg when activated. Cold for up to 2 hours from frozen, up to 30 minutes after 1–3 minutes in ice water. Skin cooling up to 17 °C on bare skin, 13 °C over a shirt (maker's figures). Unisex XXS–5XL for chest 80–125 cm; ends at the navel.

Price conditions

Not published for Japan. The maker's Australian online store lists the vest at AUD 198.00, or AUD 356.40 for a blue-and-white pair in one size (2026-10-11); it does not state whether GST or shipping is included. Import duties and taxes are paid by the buyer.

Trial

Not in public info

Lead time

No lead time is published for Japan. The maker's store sends international orders by Australia Post standard post, for which Australia Post quotes 5–10 working days (maker's terms, 2026-10-11).

Service and repair

Manufacturer defects found within 60 days of purchase may be exchanged for an identical item after inspection; misuse is not covered. Size exchanges within 7 days only for vests that are unworn, unwashed and not activated, with the buyer covering postage (maker's terms).

Local partner

Not in public info

StandardsMaker's declaration

Not in public info