Which under armour keeps you cool? - Retro Ravers

Which under armour keeps you cool?

Which Under Armour Keeps You Cool? A Straightforward Guide to Staying Dry and Comfortable

 

Table of Contents

  1. Introduction: Why Staying Cool Matters

  2. UA Cooling Technologies

    • HeatGear®

    • Iso-Chill

    • UA Tech™

  3. Best Overall for Hot Weather: HeatGear Compression Shirt

  4. Best Cooling Shirt: Iso-Chill Short Sleeve

  5. Best for Everyday Training: UA Tech T-Shirt

  6. Best for Runners: Iso-Chill Running Shirt & Shorts

  7. Best Cooling Underwear: UA Tech Boxerjock

  8. Best for Women: HeatGear Crop & Infinity Bra

  9. Best Tank Top: Iso-Chill Tank

  10. Accessories That Help You Stay Cool

  11. Layering Strategy for Hot Weather

  12. Conclusion: Which Under Armour Keeps You Cool?

 

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Whether you’re running in the summer heat, grinding through two-a-days, or trying to avoid becoming a puddle during a gym session, keeping cool is key to performance. That’s where Under Armour (UA) comes in.

UA built its reputation on making gear that works with your body, not against it. And when it comes to heat, sweat, and staying comfortable under pressure, they’ve dialed in some high-performance technology.

So—which Under Armour keeps you cool?

Let’s break it down. We’ll look at the cooling tech, top products, and how to build a go-to setup for hot, humid, and high-sweat conditions.

1. Start With the Tech: How Does UA Keep You Cool?

UA doesn’t rely on just one fabric or product line to handle heat. They’ve built a range of technologies designed to regulate body temp, wick moisture, and speed up evaporation.

Here are the cooling MVPs:

HeatGear®

This is the foundation of all UA warm-weather gear. It’s light, breathable, and designed to wick sweat and dry fast. The compression version also supports muscles without trapping heat.

HeatGear is ideal for:

  • Hot-weather training

  • Indoor workouts

  • Any activity in temps above 75°F (24°C)

Iso-Chill

UA’s next-level cooling fabric. Iso-Chill is engineered with flat yarns that disperse heat and even includes cooling minerals that give it a cool to the touch feel. Not marketing hype—it actually feels cold when you put it on.

Iso-Chill is ideal for:

  • Intense outdoor training

  • Golf, tennis, or running in direct sun

  • Athletes who overheat easily

UA Tech™

UA’s everyday performance fabric. It’s looser than compression gear, great for casual workouts or hot days when you don’t want anything tight.

UA Tech is ideal for:

  • General training

  • Outdoor activity in warm climates

  • People who prefer a regular T-shirt feel with performance benefits

2. Best Overall for Hot Weather: UA HeatGear Compression Shirt

The original and still one of the best. The HeatGear Compression Shirt is made to fit like a second skin—tight, lightweight, and breathable.

Why it works:

  • Wicks sweat before it builds

  • Mesh underarms for ventilation

  • Anti-odor treatment keeps things fresh

When to wear it:

  • High-intensity training

  • Hot weather running

  • Layering under jerseys or pads

This is a go-to for serious athletes. It won’t soak up sweat or weigh you down. You’ll stay dry and light even during long sessions.

3. Best Cooling Shirt: UA Iso-Chill Short Sleeve

If HeatGear is a classic, Iso-Chill is the innovation.

Why it's better in the heat:

  • Feels cold when you touch it—literally

  • Pulls heat away from your skin

  • Stretchy, light, and fast-drying

Best for:

  • Long outdoor sessions (tennis, golf, football)

  • Extreme heat or sun exposure

  • Athletes who need every cooling edge

You’ll notice the difference the moment you put it on. Iso-Chill shirts come in crew necks, polos, and compression styles depending on your sport.

4. Best for Everyday Training: UA Tech™ T-Shirt

This is the T-shirt you can wear to the gym, to run errands, or on a summer hike.

What makes it work:

  • UA’s signature sweat-wicking, fast-drying fabric

  • Roomy, athletic cut

  • Feels like a regular tee, performs like workout gear

When to wear it:

  • Moderate training days

  • CrossFit, HIIT, or lifting

  • Travel or active days in warm weather

This one won’t win awards for elite performance, but it delivers reliable comfort in warm conditions—and looks good doing it.

5. Best for Runners: UA Iso-Chill Run Shirt + Shorts

Running in heat is a whole different beast. You need gear that breathes, moves with you, and cools fast. That’s where Iso-Chill running apparel comes in.

Top picks:

  • UA Iso-Chill Run Short Sleeve

  • UA Iso-Chill Launch Shorts

Why they work:

  • Ventilated, stretch-woven materials

  • Cooling minerals in the fabric

  • Minimal seams = less chafing

  • Designed for high-output movement

Add-on tip: Pair it with UA Run Cap or Iso-Chill visor to keep the sun off your face without trapping heat.

6. Best for Underwear: UA Tech Boxerjock®

You could wear a moisture-wicking shirt and shorts, but if your underwear is cotton? You're still gonna be miserable.

Best bet: UA Tech Boxerjock

Why it matters:

  • No-pinch waistband

  • Quick-drying and anti-odor

  • Breathable where it counts

Good for:

  • Any hot day, gym or not

  • Avoiding sweat swamp

  • Comfortable all-day wear

They’re also tagless and come in 3”, 6”, and 9” lengths depending on preference.

7. Best for Women: UA HeatGear Armour Crop & Bra

Women’s gear isn’t just a smaller version of men’s. UA’s women’s HeatGear line is built for real movement and support.

UA HeatGear Armour Crop Leggings

  • Ultra-light

  • Stay-put waistband

  • Breathable mesh panels

  • Great for warm-weather workouts or layering

UA Infinity Mid Sports Bra (HeatGear fabric)

  • Strategic support

  • Perforations for breathability

  • Soft, cool interior

These pieces wick sweat without sticking and move without bunching.

8. Best Tank Top: UA Iso-Chill Tank

Sleeves optional. When it’s really hot, you want airflow on your arms and shoulders. UA’s Iso-Chill Tank does that and more.

Why it's great:

  • Cooling to the touch

  • Stretchy and snug but not tight

  • Mesh panels = better airflow

When to wear:

  • Summer training sessions

  • Beach workouts

  • Anything with direct sun exposure

If you’re looking for max ventilation, this is it.

9. Accessories That Help Keep You Cool

Don’t stop at the shirt and shorts. UA has some clutch accessories that help regulate heat and manage sweat.

Caps

  • UA Iso-Chill Launch Cap: Lightweight and actually cool to the touch. Reflects heat, not just blocks sun.

Headbands

  • UA Performance Headband: Wicks sweat off your face so it doesn’t drip into your eyes.

Socks

  • UA HeatGear Crew or Low-Cut Socks: Ventilated, quick-drying, and padded where you need it.

Arm Sleeves

  • UA Iso-Chill Arm Sleeves: For sports like golf or baseball, where sun protection and cooling are both essential.

10. Layering Strategy: How to Dress for the Heat

Hot weather demands a different strategy than cold. You don’t want to layer much—but you do want to stay dry and prevent overheating.

Here’s a simple rule:

Condition What to Wear
Indoor Gym, Warm Weather HeatGear or Tech shirt + shorts
Outdoor, Moderate Heat UA Tech or HeatGear + visor/cap
Outdoor, Intense Heat or Sun Iso-Chill shirt or tank + Iso-Chill shorts + sweat-wicking underwear
Running/HIIT Iso-Chill compression or UA Tech tank + running shorts
Everyday wear in heat UA Tech tee + HeatGear underwear

Keep it light, breathable, and close to the skin to maximize wicking and airflow.

Final Answer: So, Which Under Armour Keeps You Cool?

It depends on how hot it is and what you’re doing. But here’s the cheat sheet:

  • Best cooling tech overall → Iso-Chill

  • Best compression cooling → HeatGear Compression

  • Best casual training → UA Tech

  • Best for serious runners → Iso-Chill Run gear

  • Best women’s gear → HeatGear Armour leggings + UA Infinity Bra

  • Best underwear → UA Tech Boxerjock

If you're serious about staying cool:

  1. Start with HeatGear or Iso-Chill tops

  2. Pair with ventilated shorts and performance underwear

  3. Don’t overlook cooling accessories like caps and socks

And skip cotton. Always.

TL;DR

The coolest Under Armour gear is anything made with Iso-Chill. It’s literally cool to the touch and engineered for peak performance in the heat. HeatGear is the OG that still works great for compression and general sweat management. UA Tech gives you casual comfort with sweat-wicking performance.

If you’re building a heat-ready UA setup:

  • Top: Iso-Chill or HeatGear

  • Bottoms: Iso-Chill shorts or UA Tech shorts

  • Underwear: UA Tech Boxerjocks

  • Shoes/socks/accessories: Lightweight and breathable

Stay light. Stay dry. Stay cool.

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