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FREE SHIPPING OVER $50
4.9 · 2,400+ Reviews
$16.07
The world's first PCM-powered neck-cooling ring. No batteries. No electricity. Just pure, instant relief — for up to 2 hours.
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No Batteries
Instant Cool
2-Hr Relief
HOW IT WORKS
No batteries. No plugs. Just cold water and a few minutes.
01
Drop the ring in cold water or ice water for 3–5 minutes until the PCM core solidifies.
02
Flex the ring open, place it around your neck, and feel the cooling sensation begin instantly.
03
The PCM core gradually absorbs your body heat, providing steady, comfortable cooling for hours.
WHY CHILLO™
PCM Technology
Unlike gel packs that warm up in 20 minutes, Chillo's Phase-Change Material core holds a precise 58°F cooling temperature for up to 2 continuous hours.
58°F steady cooling
2-hour duration
Reusable 1000+ times
One-size, any occasion
Lightweight and discreet, Chillo fits under a collar or over workout gear. Athletes, commuters, outdoor workers — finally, relief that goes where you go.
165g ultralight
Waterproof & sweatproof
No straps or fastenings
Sustainable design
Chillo is 100% rechargeable — just cold water. No single-use ice packs, no electronics, no batteries ever. Built to last a lifetime.
Zero electricity
Zero waste
Lasts a lifetime
WHAT CUSTOMERS SAY
2,400+
Reviews
4.9 ★
Average
98%
Would Recommend
“I wore it to a music festival in 95°F heat and honestly forgot I was even warm. Life-changing little gadget.”
Sarah T., Austin TX
“Been using it on my morning runs for 3 weeks. Stays cold the whole 5K. Love that I just drop it in ice water and go.”
Marcus L., Phoenix AZ
“I'm a nurse and wear it on 12-hour shifts. The 2-hour cooling is legit — I just re-cool it on my breaks.”
Priya K., Houston TX
“Bought one for me, ended up buying three more for my family. The quality is way better than I expected.”
James O., Miami FL
“No batteries, no fuss, just cold. Perfect for my outdoor job. Worth every penny.”
Dan M., Las Vegas NV
On all orders over $50
No questions asked
We stand behind every ring
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FAQ
How does Chillo actually work?
Chillo uses Phase-Change Material (PCM) — a substance that absorbs a large amount of heat energy as it transitions from solid to liquid at a fixed temperature of 58°F (14°C). When you wear it, the PCM draws heat away from your neck consistently, for up to 2 hours.
How do I recharge it?
Simply submerge Chillo in cold water or a bowl of ice water for 3–5 minutes, or place it in the freezer for 15–20 minutes. The PCM core re-solidifies and it's ready to use again.
How long does the cooling last?
Chillo provides up to 2 hours of steady cooling per charge, depending on ambient temperature and activity level. In extreme heat (95°F+) you may get around 90 minutes.
Is it waterproof?
Yes — Chillo is fully sealed and waterproof. You can wear it while sweating or in light rain. We do not recommend full submersion in water while wearing it.
What sizes does Chillo come in?
Chillo is designed to fit most adult neck sizes with a flexible, one-size-adjustable design. The ring diameter is 130mm and it weighs just 165g.
What's your return policy?
We offer a 30-day no-questions-asked return policy. If you're not 100% satisfied, contact our support team and we'll arrange a free return and full refund.