The Cooling Game

Million Dollar Question: Which is more important to human performance, thermoregulation (regulating body temperature) or hydration?

Hint:  You can fall victim to heat stroke even when fully hydrated.

The correct answer is "Both", yet you're not alone in your surprise that thermoregulation is as critically important as hydration -- it's why sports drinks are on every athletic bench while cooling vests are virtually unknown by all but elite athletes. 

Think about wearing a cooling vest the same way you think about wearing your winter coat.

Without a winter coat, your body will attempt to warm itself by shivering. Shivering cannot keep you warm to the degree a warm winter coat can, but instintively we know this and bundle up appropriately. 

Without a cooling vest, your body seeks to cool itself by sweating. Sweating eventually results in dehydration, and is in no way sufficient in preventing heat stress and/or heat stroke.


PRECOOLING stalls the point at which overheating would normally occur. If your activity doesn't allow for cooling on-the-job, then this method of cooling is for you:

  • Precool for 30 minutes or longer to outlast your competition
  • Precool to boost your mental and physical endurance 
  • Precool while "warming up" to reserve your game-time performance


  • Throw on your cooling vest whenever you take a break to restore physical and mental endurance


  • Your body keeps sweating after extended activity in warm environments. Your cooling vest helps your body safely recover.
  • Ice Tubs are considered the gold standard for cooling an overheated athlete, but are not always available. The Maximo Cooling Vest is the next best option.
Important: Heat exhaustion can turn into heat stress within only a few minutes. If you, or someone in your presence, falls victim to heat stress or worse, call 911 for immediate medical attention. Cool first, transport second! Oro Sports + Safety cooling products are not a replacement for medical attention. With proper cooling practices, heat injuries can be minimized and/or prevented.  
    ★ Reviews

    Customers Talk

    41 reviews
    Super service, agreed to correct size of ice pack.

    Returning reply could be faster.

    A really quality product!

    I’m a 28 year old woman from Brisbane, Australia who suffers from Postural Orthostatic Tachycardia Syndrome (POTS) and practices ballet. The combination of Brisbane weather and serious heat intolerance means a hot day can be absolutely debilitating for me. I found the Oro sports vest because I was looking for something that wasn’t too bulky and would not embarrass me if I wore it in public or at ballet class. This product is really good, not only does it look great and is really well made structurally but the gel inserts keep me cool for hours, even without aircon.
    If I had to find fault with the vest it would be that it is designed as unisex and does not take a woman’s chest into account. On me it does not cool my entire front uniformly as my chest distorts the shape. But this is just nitpicking, the vest still works great. The only cool vests available in Australia are made for construction workers so I was really excited to see something designed specifically for sport (the freedom of movement is great!)

    Ultra Runner

    "The Oro Sports Maximo Cool vest has been a great resource for me on my recovery runs in Savannah, GA. The vest keeps me cool while training directly on my skin below my HOKA ONE ONE training gear without chafing. Topical cooling is very important in long ultraraces. I would recommend using this vest for the hottest parts of the day in events like Western States 100 and Javelina Jundred."

    Patrick Reagan
    HOKA ONE ONE and GU Energy Labs Professional Ultrarunner

    Awesome headbands!


    Small product big results

    with the heat waves in cali, compounded with all the wild fires and heavy smoke.. its hard to keep cool! The headband got my whole body to cool off in just a few minutes.. im blown away.. i can think of so many people that could benefit! Great product!