The System
How It Works
Two cooling mechanisms working together — one blasting cool air to the back of your neck and head, and the other cooling your head by sitting on it — a soft, oval-shaped cold gel pack that fits inside a baseball cap or hat and will cool your head instantly — a KOOLNUT.
Your Personal Air Cooling Backpack
The Secret Weapon
The Hat Cape System
The bucket hat comes with a removable neck cape that drapes down over the top opening of the backpack — sealing in the cold airflow and concentrating it around your neck, face, and shoulders.
It transforms the backpack and hat into a fully enclosed personal microclimate system that goes wherever you go.
See All Hats ↓
Step 2 — The KOOLNUT Gel Pack
20,000mAh
By the Numbers
Built to Last All Day
Choose Your Color
Three Models. One Mission.
All three include the complete cooling system. Black and Yellow feature the larger 250 CFM fan for maximum power in the most demanding heat.
Blue
The original KOOLNUT. Quieter airflow — ideal for moderate heat or those who prefer a gentler, near-silent breeze all day.
Black
Maximum power. The top-selling model for outdoor work, construction, fishing, and boating in peak summer heat.
Yellow
High-visibility yellow with the same 250 CFM fan. Ideal for job sites, outdoor crews, or anywhere being seen matters.
The Perfect Pairing
KOOLNUT Hats
Each hat works with the backpack system. The removable neck cape drapes over the pack opening, sealing cold air around your neck and face. Every hat includes two KOOLNUT gel packs and a bonnet.
100% Cotton Bucket Hats
Wide-brim bucket hat insulated at the crown with a UV-blocking fabric to reduce heat.
KOOLNUTs
Each hat comes with 2 KOOLNUTs and a bonnet.
Bucket Hat + Cape
Stylish with removable neck cape.
The Science
Your Hypothalamus
The hypothalamus is your brain's built-in thermostat. It monitors your core temperature and triggers sweating and vessel dilation to cool you down. But when the hypothalamus itself overheats, the whole system can fail.
The brain is one of the body's highest-circulation organs. Cooling the head directly gives your hypothalamus the support it needs to regulate your entire body temperature more effectively.
Heatstroke is a life-threatening emergency that begins at 104°F (40°C). Symptoms include confusion, slurred speech, seizures, and coma. KOOLNUT's dual system targets the problem at the source — before symptoms ever begin.
Your Daily Heat Partner
Re-freeze the gel packs and ice bricks overnight, recharge the battery — and you're ready for another full day. Whether you're working a job site, on the water, trekking a trail, or playing a round of golf — KOOLNUT is your daily heat partner.
See It in Action
KOOLNUT in the Wild
Real people. Real heat. Real relief.