Summer mountain hiking is a rewarding activity that lets you discover stunning landscapes and recharge in the heart of nature. However, to make the most of the experience, choosing the right outfit is essential. Conditions in the mountains can vary considerably, even in summer, and being well equipped is crucial to staying comfortable and safe. Explore all our tips for choosing the ideal outfit for summer mountain hiking.

Key criteria for choosing your hiking or trekking outfit in the mountains
Everyone approaches hiking in their own way, and it is essential to adapt your outfit to your specific needs. Here are a few criteria to consider to help you make the best choice:
- The duration and intensity of the hike: For a short, low-intensity hike, simple and comfortable clothing may be sufficient. For a more demanding hike or a multi-day trip, however, it is crucial to choose clothing that provides good support, optimal breathability and protection against bad weather.
- Altitude: The higher you go, the lower the temperature. On average, it drops by 6°C for every 1,000 metres gained. Even in summer, you can encounter snow in the mountains, so it is important to plan clothing suited to temperature variations.
- Your personal sensitivity to cold: Some people feel the cold more than others. It is important to know your own sensitivity so you can choose clothing that keeps you both warm and dry without causing overheating. If you are particularly sensitive to the cold, do not hesitate to pack extra layers even if the weather looks favourable.
Choosing your summer hiking clothing: tops
For a good summer mountain hiking outfit, opt for a lightweight, breathable t-shirt. Its main purpose is to wick moisture away from your body and keep you dry. A t-shirt with UV protection is also recommended, as the sun is more intense at altitude.
Furthermore, even in summer, the three-layer rule still applies to avoid any nasty surprises. Pack a mid layer, such as a lightweight, breathable fleece, to insulate you from the cold if needed. This layer will come in handy during breaks or if temperatures drop.
Finally, it is crucial to have a jacket that protects you from the elements (wind, rain…). A water-resistant jacket may be sufficient, but a hiking jacket that is fully waterproof is preferable, as a heavy downpour or storm can come on quickly. Make sure this jacket is also breathable to prevent sweat build-up inside.

What fabrics should you choose?
Synthetic fabric t-shirts have the advantage of being breathable and quick-drying, making them ideal for your summer mountain hiking outfit. These materials allow excellent moisture evaporation, helping to maintain a comfortable body temperature.
For multi-day hikes, merino wool offers excellent thermal regulation and naturally resists odours, allowing you to wear the same t-shirt for several days without discomfort. Merino wool is also very soft and does not cause irritation, even when worn directly against the skin.
For anything beyond a gentle stroll, however, avoid cotton, which retains moisture and dries slowly, potentially leading to rapid chilling and an uncomfortable feeling.

Choosing your summer hiking clothing: bottoms
- Shorts: Hiking shorts are ideal for warm days, offering great freedom of movement. However, they are not suited to all weather conditions, particularly at high altitude where temperatures can be low. Shorts with zipped pockets can be very practical for keeping your valuables secure.
- Trousers: Essential for high-altitude hikes, hiking trousers protect against wind, showers and cooler temperatures. Hiking trousers are designed to be lightweight, durable and unrestricting. Some models feature reinforcements and ventilation systems for added comfort.
- 2-in-1 trousers: Offering great flexibility, these trousers can be converted into shorts as needed, making them ideal for significant temperature changes. They allow you to adapt easily without having to change clothes.
The best footwear for summer
The walking shoes in your summer mountain hiking outfit must be breathable enough to prevent your feet from becoming drenched in sweat, which increases the risk of blisters. Look for shoes with soles designed to wick away moisture and lightweight, breathable materials. Make sure they offer good support and grip for varied terrain.
Low-cut shoes are often preferred in summer for their lightness and better ventilation. They are ideal for less rugged terrain and shorter hikes. Mid or high-cut shoes, on the other hand, are better suited to rugged terrain or longer hikes. They offer better ankle support and increased protection against impacts. Do not overlook waterproofing in case of rain.
To find out more, explore how to choose your hiking shoes.

Essential kit for summer mountain hiking
To complete your summer mountain hiking outfit, certain accessories can prove very useful:
- Cap: A cap to protect you from the sun and prevent heatstroke. The cap should be made from breathable material to prevent heat build-up.
- Neck gaiter and gloves: A neck gaiter and lightweight gloves can be useful to pack, especially for early morning starts and on shaded terrain.
- Sunglasses and sun cream: Protect your eyes and skin from the intense UV rays at altitude. Choose sunglasses with high UV protection and a sweat-resistant sun cream. Apply it to all areas of your body not covered by clothing.
- Hiking poles: They can provide extra support on rugged terrain and reduce muscle fatigue. Adjustable poles are practical for adapting to different terrain and gradients.
- Backpack: Opt for a lightweight backpack with good ventilation and enough compartments to organise your kit.