147 of 1,000 founder units claimed · $49 early price · Ships August 2026 Claim yours →
Phase-change cooling — wear it anywhere

Beat the heat.
Wear the chill.

18°C of real cold against your skin. No batteries, no cables, no noise. Recharge in ice water in 8 minutes.

Claim $49 founder price → How it works ↓
18°C
Skin temp
~2 hrs
Per charge
8 min
Recharge
0 watts
No battery
PCM locked at 18°C
The problem with cooling

Most wearables don't actually cool.

Battery gimmicks that die fast. Towels that warm up in minutes. KRYO is the third option.

01 — Fans

Battery neck fans

Blow 33°C air at you. Moving hot air isn't cooling — it's physics.

02 — Towels

Cooling towels

Lukewarm in 15 minutes. Drip on your collar. Need constant rewetting.

03 — Ice packs

Bulky ice packs

Painful, heavy, melt fast. Not built for daily wear.

04 — KRYO

Actually cold. All day.

18°C phase-change material against your skin. Silent, passive, reusable. Drop in ice water for 8 minutes. That's the whole routine.

The science, simply

Not a gadget. A physics problem.

PCM tech is trusted in medical cold chain and aerospace. KRYO applies it at body scale.

It stores cold, not power

The core holds thermal energy at exactly 18°C — no electricity, no fans. Real cold maintained directly on your skin.

◆ Fully passive · No electronics

Reset it with ice water

8–10 minutes in ice water and it's ready again. No outlet, no charger — anywhere there's ice, you can recharge.

◆ 8–10 min · Anywhere with ice

The system carries the loop

Gel packs travel frozen in the insulated case. Swap mid-day, refreeze at night. No consumables, ever.

◆ Infinite reuse · No waste
The KRYO system

Three pieces. Infinite cold loops.

Wear, swap, refreeze. The ring cools you, gel packs reset the loop, the case keeps the next round ready.

KRYO bundle: neck ring, two gel packs and EVA case.
  1. 01

    Neck ring · 18°C PCM core

    Matte black TPU shell, 16.7 × 19 cm. PCM locks at 18°C — real cold without the shock of direct ice.

    PCM · 18°C · TPU · ~2 hrs per cycle
  2. 02

    Two reusable gel packs

    Circular 15 × 15 cm packs. Freeze, carry in the case, swap when the first cycle ends.

    2 packs · 15 cm · Cycle-tested
  3. 03

    Insulated EVA carry case

    Hard-shell, 21 × 21 cm. Matte black, foil-lined interior. Keeps packs cold for hours off-freezer.

    Hard-shell EVA · Foil-lined · 21 cm
Specifications

Honest specs. No marketing math.

Wear, recharge, repeat — all day, no outlet required.

Skin temperature 18°C Tuned for 30°C+ humid heat. Cold without shock.
Wear time ~2hrs Per recharge in active tropical conditions.
Recharge 8–10min In a bowl of ice water. No power needed.
Battery required 0W No batteries, cables, or electronics.
Why it works

Engineering, not promises.

PCM physics, not promises

Phase-change materials are trusted in medical cold chain and aerospace. KRYO applies the same science at body scale, tuned to 18°C for everyday heat.

No consumables. Ever.

No batteries to degrade, no filters to replace. Recharges indefinitely in ice water — cost per session approaches zero over time.

Pre-order protected

Full refund anytime before dispatch — no questions. Timeline changes, you hear from us first. Email support@trykryo.com.

Built for every hot moment

Wear. Swap. Repeat.

KRYO worn outdoors in the heat.

Step outside. Stay ice-cold.

Full KRYO system — ring, case, gel packs.

Frozen packs. Ready in the case.

KRYO PCM material close-up.

18°C holds longer than you think.

KRYO recharging in ice water.

A bowl of ice water. Eight minutes. Done.

18°C PCM  ·  No batteries  ·  No cables  ·  No fan noise

First run · 1,000 units only

853 units remaining at $49.

853
Units remaining at $49
147 claimed 1,000 total · first run
$49
Founder price · $59 at retail
Full refund
Anytime before dispatch
August 2026
Ships worldwide

First run only.

1,000 units, deliberate cap — tighter QC, direct accountability to early buyers. After this run sells out, KRYO moves to retail at $59. The $49 founder price doesn't apply to any future run.

vs. the alternatives

How KRYO stacks up.

The honest comparison — no tricks.

 
KRYO
Battery neck fan
Cooling towel
Price
● $49 early / $59 retail
○ ~$15–30
○ ~$5–12
Real cold on skin
● 18°C PCM contact
○ Moves air, not cold
○ Lukewarm in 15 min
No batteries / cables
● Fully passive
○ Needs charging
● Yes
Wearable in public
● Matte black minimal
○ Plasticky, noisy
○ Damp cloth on neck
Recharge without power
● Ice water, 8 min
○ Needs a power outlet
● Water source
No consumables
● Cycle-tested · infinite reuse
○ Battery degrades
● Yes
KRYO $49 early
  • ● 18°C PCM cold on skin
  • ● No batteries, cables, or noise
  • ● Recharge in ice water, 8 min
  • ● Matte black — wearable anywhere
  • ● No consumables · infinite reuse
Battery neck fan ~$15–30
  • ○ Moves 33°C air at you
  • ○ Loud, plasticky, needs charging
  • ○ Battery degrades over time
Cooling towel ~$5–12
  • ○ Warm in under 15 minutes
  • ○ Needs constant rewetting
  • ● Passive and silent
Tap each to expand
Pre-order · 853 units remaining

Get KRYO at $49.
Ships August 2026.

$49
Founder price · 853 of 1,000 remaining Retail after launch: $59
  • Full bundle — ring, two gel packs, insulated carry case
  • 1,000 units only — no restock at this price
  • Full refund anytime before dispatch
  • Ships August 2026
Secure checkout Visa · Mastercard Full refund before dispatch

Pre-order. Ships August 2026. Covered by our Refund Policy. The $49 founder price is locked for pre-order customers — retail is $59 after launch.

Frequently asked

Answers, honestly.

More questions? support@trykryo.com

Why does this cost more than a neck fan?
A neck fan moves air. In 33°C humidity, that air is 33°C — it's not cooling you. KRYO maintains 18°C of actual cold on your skin using phase-change physics. Different mechanism, not just a different product.
How long does one charge last?
1.5 to 2 hours in hot, humid conditions. The system is designed for rotation — ring on you, gel packs in the case — so you can stay cool across a full day without a power outlet.
How do I recharge it?
Drop it in a bowl of ice water for 8–10 minutes. No freezer needed for the ring. Anywhere you can get ice, you can recharge.
Are there batteries or electronics?
No. Fully passive. No batteries, no cables, no electronics — nothing to break, charge, or replace.
When does it ship?
August 2026. Production starts after the order window closes. We'll update every pre-order customer at each milestone. Full refund available anytime before dispatch.
What if something goes wrong?
Email support@trykryo.com. Refund before dispatch — immediate, no questions. Issue after delivery — we make it right.
Can I travel with it?
Yes. Non-electronic, carry-on friendly. The insulated case keeps packs cold for hours. Check your airline's rules for gel packs.
Is this a medical device?
No. A wearable cooling accessory for everyday comfort. Not certified to treat or prevent heat illness. Consult a clinician if you have a heat-sensitive medical condition.
$49 founder price
853 units left · Ships Aug 2026
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