The trail has a way of testing both you – and your gear. Knowing what to wear hiking makes the trail feel easier. The right layers manage moisture on steep climbs, protect against changing weather and move comfortably across uneven terrain – without adding the weight or bulk that pulls you out of the moment.

“When I feel cool and confident in my outfit, I approach the trail with that same energy,” Lena Strohmaier, an On ambassador says. “Nothing is worse than gear that doesn't fit and feel right: shorts that move up or a shirt that’s the wrong length can totally ruin my focus.”

“A good outfit should support you and then "disappear" so you can stay present in the mountains,” she adds. Whatever the season or trail conditions, the goal stays the same: less time thinking about what you're wearing, more time taking in where you are.

Hiking starts before the trailhead. What you wear shapes how the trail feels – whether you're moving comfortably, adapting to changing weather or regretting the layer you left behind.

“I go for the classic ‘German onion look’ with lots of layers,” says Strohmaier. “I usually start with a base layer top and a light long-sleeve, because that mountain sun hits differently.” Strohmaier is never without a hat and sunglasses, and always packs a wind or rain jacket.

Most experienced hikers rely on a simple three-layer system: a moisture-wicking base layer, an insulating mid-layer and a protective outer shell. From there, everything else – shoes, socks, hat – falls into place.

“Invest in good socks,” Strohmaier adds. “Your feet will thank you later.”

Here's what to look for in each piece:

1. Moisture-wicking base layer

Your base layer sits closest to the skin, pulling sweat away before it cools the body. That matters on steep climbs or whenever conditions shift fast.

“As a woman, I have to start with the sports bra,” says Strohmaier. “If it doesn’t fit perfectly, the trail vest will cause some serious chafing by the end of the day.”

Beyond that, look for a close but non-restrictive fit in merino wool or synthetic fabric. Merino wool regulates temperature and resists odor, while synthetics dry faster and tend to be lighter.

Strohmaier’s advice is to invest in one really good base layer. “A high-quality base layer is essential because it keeps you dry and comfortable as you move,” she says. “It’s the foundation of that ‘onion look’ I talked about.” 

Whether you choose merino or synthetic, the goal is the same: a layer that helps regulate temperature so the rest of your system can do its job.

2. Temperature-control mid-layer

The mid-layer helps you stay warm without overheating. Fleece and lightweight insulated jackets trap heat when temperatures drop, while remaining breathable enough for sustained effort, even in damp conditions.

That balance becomes especially important on climbs, where trapped heat can quickly turn into lingering sweat. A streamlined layer like the Climate Jacket helps regulate temperature as conditions change.

3. Protective outer layer

Your outer layer protects against wind, rain and sudden drops in temperature. Depending on the forecast, that might mean a lightweight waterproof shell like Ultra Jacket or Performance Jacket, or a more insulated option like the Challenger Jacket for cold-weather hikes.

“When you’re moving, you don't want to feel like you’re trapped in a plastic bag,” says Strohmaier. “I look for fabrics that feel light and stretchy so I don't feel restricted. On a long descent, wind protection is everything; it keeps you from getting chilled without having to constantly stop and change.”

Protection becomes most important when the weather turns. Even a mild breeze at elevation can pull heat away faster than expected. Look for features like: 

- An adjustable hood that fits over a hat

- Sealed seams that keep moisture out at the joins

- Ventilated underarms so you can regulate temperature without having to stop and strip a layer

If you’re carrying an extra layer in your pack, weight and packability still matter. The best outer layers stay easy to carry and easy to throw on the moment the weather changes.

4. Hiking shoes or trail runners

The right footwear depends on the trail ahead. Trail runners are lighter, more breathable and designed for a more agile stride, like the Cloudventure and Cloudsoma. They work well on maintained paths, fast-paced hikes and routes where flexibility matters more than high support.

On the other hand, traditional hiking boots like the Cloudrock Mid Waterproof offer more structure underfoot, with reinforced ankle support and added protection for rougher or multi-day terrain.

Neither is better across every condition – it comes down to matching the shoe to the trail. “Good shoes mean you can trust your feet,” says Strohmaier. “That security is what allows you to relax, breathe, and really connect with nature instead of just worrying about the logistics.”

5. Performance socks

Socks are easy to overlook – until friction and moisture turn into blisters a few miles in. Look for moisture-wicking fabric, reinforced heel and toe panels, and targeted cushioning underfoot that hold up on rough terrain.

Fit matters just as much. A sock that slips or bunches creates friction that even the best shoe can't fix. Try the Trail Sock High for targeted comfort or the Explorer Merino Sock for more breathability.

6. Hiking pants or shorts

Your hiking pants or shorts need to move as well as you do. Look for: 

- Stretchy enough for big steps up and over terrain.

- Quick-drying fabrics when moisture or weather sets in.

- Durable enough to handle brush, rock and repeated wear.

While leggings offer a close, flexible fit, the friction from a loaded pack can cause bunching and riding up over longer distances. A pair like the Weather Pants balances mobility with weather protection – using articulated knees and a waistband built to sit comfortably under a hip belt.

7. Hat

A hat earns its place on almost every hike. In full sun, it shades your face, protects your scalp and reduces glare on exposed trails. Wide-brimmed styles offer the most coverage, while a Lightweight Cap works well on warmer or more shaded routes.

When temperatures drop, focus on insulation. A Merino Beanie helps retain heat on cold starts, windy ridgelines or high-elevation hikes. If conditions are unpredictable, packing both is worth the space.

8. Backpack

For most day hikes, a 20 to 30L pack gives you enough room for water, layers, snacks and trail essentials without adding unnecessary bulk.

Weight distribution and comfort is more important than total capacity. Look for:

- A padded hip belt to shift weight off your shoulders

- A sternum strap for stability on uneven ground

- Back paneling for airflow between the pack and your body

Water-resistant fabrics, compression straps and a few well-placed pockets all make a difference once the trail gets longer or more technical.

9. Sunglasses

Sun exposure feels stronger on the trail, especially on terrain where light reflects off rock, water or snow. A good pair of sunglasses reduces glare, protects your eyes and helps minimize fatigue over long distances. UV400 protection is the baseline – it works to block the full spectrum of ultraviolet light that causes long-term damage. Polarized lenses add extra clarity in bright conditions by cutting reflective glare.

The best pair is the one that actually stays on your face. Look for close-fitting frames that stay secure on uneven ground and help block wind, dust and debris.

Summer hiking is all about staying cool without sacrificing protection. Heat, sun exposure and sweat put your clothing to work fast. “The right gear is like a safety net,” says Strohmaier. “It changes your mindset from "I hope I’m okay" to "I’ve got this."

Lightweight shorts and moisture-wicking tops improve airflow and dry quickly on steep climbs or exposed trails. Lighter colors also help reflect heat in direct sun.

UPF-rated fabrics add another layer of protection – they’re a physical barrier against UV rays that doesn't wash or wear off mid-hike. On long, exposed routes, it's worth building that protection into what you're wearing rather than relying on reapplication.

“Being prepped for whatever comes gives you a lot of security,” says Strohmaier.

Cold-weather hiking comes down to smart layering. The goal is to stay warm without trapping sweat or restricting movement.

Thermal base layers, insulating mid-layers and weather-protective outerwear work together to create pockets of warm air while still allowing heat to escape when effort levels rise. Lightweight insulation usually performs better than heavy, bulky layers that limit mobility.

Don't overlook accessories, either. Gloves, neck gaiters and beanies make a major difference once temperatures drop or wind picks up at elevation.

Some choices feel fine at the trailhead and become mistakes a few miles later. Here's what's worth leaving behind:

- Cotton: Holds moisture, dries slowly and cools the body once temperatures drop.

- Denim: Heavy, restrictive and slow to dry on trail.

- Brand-new footwear: New shoes need breaking in. Blisters form fast when fit and flexibility haven't been tested yet.

- Oversized or poorly fitted packs: Uneven weight distribution puts unnecessary strain on the shoulders and lower back.

- Jewelry and loose accessories: Rings, necklaces and dangling straps can catch on brush or pack hardware.

- Worn-out soles: Reduced grip makes wet rock, mud and loose terrain far less stable.

Knowing what to wear hiking is all about layering for the conditions, choosing footwear that matches the terrain and packing small essentials that make long days feel easier. Get those right, and your attention stays on the trail instead of your gear.

What is the best attire for hiking? 

The best hiking attire is built around layers – a moisture-wicking base, an insulating mid-layer and a weatherproof shell – paired with trail-ready footwear and quick-dry bottoms. Beyond that, the sun, cold and rain each shift the equation slightly. Get the foundation right and the rest adapts.

What is the three-layer rule of hiking? 

This refers to the system of base, mid and outer layers that work together to manage moisture, retain warmth and block the elements. Each layer has a role. The real value is being able to add or remove pieces as the day changes.

What shouldn’t you wear while hiking? 

Cotton and denim. Both absorb moisture, dry slowly and make you cold when you stop moving. Brand-new footwear is another item to avoid until it's been properly broken in. 

What should I wear for beginner hiking? 

Start with moisture-wicking layers, a comfortable pair of trail shoes and quick-dry pants or shorts. There’s no need to overcomplicate it. The basics cover most conditions on well-maintained trails. A lightweight outer layer and a hat are helpful to include too. 

Can I wear running shoes for hiking? 

On well-maintained or moderate trails, a trail runner does the job well. Many hikers prefer the lighter, more agile feel underfoot. Technical terrain with loose rock or significant elevation change is where a more structured hiking shoe earns its place. It comes down to the trail, not a rule.