What to Wear for Your First Marathon
What to Wear for Your First Marathon (Avoid Chafing & Run in Comfort)
Running your first marathon is a huge milestone—and knowing what to wear for your first marathon can make the difference between an enjoyable race and a painful one.
The right marathon outfit helps you:
• Stay comfortable for 26.2 miles
• Prevent chafing and blisters
• Regulate body temperature
• Focus on your performance—not your clothing
In this guide, we’ll break down exactly what to wear on marathon day, including anti-chafing essentials, beginner-friendly gear tips, and common mistakes to avoid.
Why Your Marathon Clothing Matters
For beginner runners, marathon clothing is often underestimated.
Over long distances:
• Small irritations turn into painful problems
• Sweat increases friction
• Poor fabric choices lead to chafing
That’s why choosing the right marathon outfit for beginners is just as important as your training plan.
The Golden Rule: Nothing New on Race Day
Before we go further:
Never wear anything new on marathon day
This includes:
• Shoes
• Socks
• Shorts or tops
• Anti-chafing products
Everything should be tested during training—especially on your longest runs.
1. Running Shoes: Your Most Important Gear
Your shoes should be:
• Comfortable over long distances
• Properly broken in (50–150 miles)
• Free from any pressure points
Avoid switching shoes close to race day—even small differences can cause major discomfort over 26.2 miles.
2. Socks: Prevent Blisters Before They Start
Blisters are one of the most common marathon issues.
Choose:
• Moisture-wicking materials
• Seamless construction
• A snug, secure fit
Avoid:
• Cotton socks
• Loose-fitting designs
The Runners Relief team really like 1000 Mile Socks – they’re not cheap, but very much worth the investment: www.1000mile.co.uk
3. Shorts or Leggings: Minimise Friction
Chafing is one of the biggest concerns for new marathon runners.
The best options:
• Compression shorts
• Running shorts with liners
• Leggings in cooler weather
If you experience inner thigh rubbing, longer compression shorts can significantly reduce friction. There are a wide variety of brands and prices for shorts and compression shorts, we find that this is an area where you can save a some money by going for a less-fashionable brand, as long as they are a good fit.
4. Running Top: Stay Cool and Dry
Your running top should be:
• Lightweight
• Breathable
• Sweat-wicking
Avoid cotton at all costs—it traps moisture and increases chafing risk.
There are LOADS of options, from simple shorts to unmissable designs, and it comes down to individual style – a great place to start is Decathlon who stock almost every brand imaginable!
5. Anti-Chafing Protection (Essential for Marathon Day)
If there’s one thing most beginners get wrong, it’s underestimating chafing.
Common problem areas:
• Inner thighs
• Underarms
• Chest (especially for men)
• Sports bra lines
For reliable protection, using purpose-built solutions is key, and this is where we specialise!
We sell hundreds of our Rubstick and Rubshield anti-chafe balms every month, and have a 4.5-star rating online – follow the links to find out more.
For protection from nip-burn or runners nipple, our Niprotect plasters are award-winning and used by endurance runners all over the world.
6. Underwear: Small Detail, Big Impact
Choose:
• Seamless designs
• Moisture-wicking fabric
Or skip underwear entirely if your shorts include a liner.
Avoid cotton—it’s one of the biggest causes of chafing in long-distance running.
7. Sports Bra (For Women)
A high-quality sports bra should:
• Provide strong support
• Prevent rubbing
• Stay comfortable over long distances
Always test this on long runs—never race in a new one.
8. Dress for the Weather
Marathon conditions can vary significantly.
Cold Start Tips:
• Wear a disposable outer layer
• Remove once warmed up
Hot Weather:
• Wear minimal, breathable clothing
• Choose light colours
Rain:
• Lightweight water-resistant layer
• Cap to keep rain off your face
9. Accessories That Improve Comfort
Small additions can make a big difference:
• Running cap (sun/rain protection)
• Sunglasses
• Running belt for fuel – we love the FlipBelt Classic
• GPS watch for pacing
10. Don’t Forget Recovery Clothing
After your marathon:
• Change into warm, dry clothes
• Wear comfortable footwear
Your body will be fatigued—comfort matters even more post-race.
Common Marathon Clothing Mistakes
Avoid these beginner errors:
Wearing New Gear – Leads to unexpected discomfort.
Ignoring Chafing Risks – Even small irritation becomes painful over time.
Wearing Cotton – Increases moisture and friction.
Overdressing – You’ll heat up quickly once running.
Skipping Anti-Chafing Protection – One of the most common and avoidable mistakes.
Recommended Marathon Outfit for Beginners
A simple, proven setup:
• Broken-in running shoes
• Moisture-wicking socks
• Compression shorts or running shorts
• Lightweight technical top
• Anti-chafing protection applied (Rubstick, Rubshield)
Bonus: Reduce Chafing Before It Starts
Prevention is always easier than treatment.
Alongside choosing the right clothing, recovery tools can help maintain skin and muscle condition during training.
Using a foam roller for runners can reduce muscle tightness and improve movement efficiency – give our new Pro-Roll a try
Final Thoughts: Comfort is Everything on Marathon Day
When it comes to what to wear for your first marathon, the goal is simple:
Eliminate discomfort before it starts
The right gear will:
• Prevent chafing
• Reduce distractions
• Improve your overall race experience
Keep it simple, test everything in training, and prioritise comfort over everything else.
Marathon Clothing Checklist
Before race day, make sure you have:
• Shoes tested on long runs
• Socks that prevent blisters
• A fully trialled outfit
• Anti-chafing protection ready
• Weather-appropriate layers
• Post-race clothing packed
