Our collections

IGNITE is a collection of long-sleeve technical T-shirts by 42K created for training and racing when temperatures turn cool.

A proposition that combines advanced textile technology, thermal comfort and exclusive designs so you can keep clocking up the kilometres first thing in the morning, at dusk or through the mid-season months.

IGNITE T-shirts are made with Neo-Tec, a technical fabric produced with 100 % recycled polyester yarn. Its weight of 140 g/m² provides greater resistance and extra protection against moderate cold, without compromising the lightness, the breathability or the freedom of movement that sport demands.

The result is a versatile, functional garment, designed to deliver comfort and performance in training sessions and races at moderately low temperatures.

It is made up of four exclusive models with an identity of their own:

IGNITE Blue
Navy blue is the predominant colour, combined with sky-blue details and a subtle gradient on the front that lends depth and dynamism to the design.

IGNITE Grey
Anthracite grey takes the lead in this model, which features small triangles in graduated orange tones across the upper chest.

IGNITE White
Off-white serves as the base for a clean, luminous design, contrasted with delicate red and grey strokes spread across the front.

IGNITE Green
Dark green dominates the design, accompanied by circular details on the upper chest and a gradient from dark green to apple green on the lower front.

IGNITE uses the unisex pattern with side vents introduced in VORTEX Winter and used afterwards in the STELLAR collection. This pattern offers optimal adaptability, a balanced technical fit and excellent freedom of movement for athletes of every level.

The collection has been developed mainly for running and trail running, although its versatility means it can also be used in other outdoor sports such as trekking, Nordic walking or functional training.

IGNITE T-shirts incorporate technologies developed to improve the comfort, the performance and the durability of the garment:

Soft-Light
A soft, delicate finish that helps reduce chafing, even during long sessions.

Dry-Tec+
Fast-drying technology that aids moisture evacuation, helps keep the skin dry and contributes to regulating body temperature.

DC4 – Long Life Run
A treatment that guarantees long-lasting colour, even after repeated washing and intensive sporting use.

A technical, versatile and sustainable collection, created to run with comfort, protection and the performance every training session demands.

STELLAR is a collection of long-sleeve running T-shirts that combines advanced textile technology, astronomical inspiration and an exclusive design for mid-season training and racing.

Made with Neo-Tec, a 100% recycled technical fabric, STELLAR T-shirts stand out for their soft feel and a special weight of 140 gr/m², which adds greater resistance and a thermal plus, ideal for running in cool conditions first thing in the morning or at dusk.

The collection comprises four exclusive models, each one inspired by an iconic star of the firmament:

– Naos: Petrol blue with intense orange details that evoke the extreme temperature of this giant star.- Vega: An elegant combination of black with neon blue accents, understated and luminous like the star Vega itself.
– Antares: Garnet and fiery orange tones that represent the vibrant character of this red supergiant.
– Alpha Orionis: A dark purple base heightened with violet, pink and orange nuances that reflect the chromatic richness of Betelgeuse, the brightest star in Orion.

As a tribute to its astronomical inspiration, each T-shirt carries on the right sleeve the name of the star, its astronomical coordinates and the depiction of the constellation it belongs to, thereby reinforcing the emotional and visual bond with the universe.

The design of the collection is based on the unisex pattern with side vents introduced in the VORTEX Winter collection, which guarantees optimal adaptability, a technical fit and excellent freedom of movement for athletes of every level.

Conceived for running and trail running, STELLAR T-shirts are versatile garments that also perform at a high level in other outdoor sports such as trekking, Nordic walking or functional training.

The T-shirts of the STELLAR collection receive latest-generation technologies to guarantee performance, durability and comfort:
– Soft-Light: a soft, delicate feel to avoid chafing even in long sessions.
– Dry-Tec+: fast drying to keep the skin dry and regulate body temperature.
–DC4 – Long Life Run: maximum colour durability, even after repeated washing and intensive use.

VORTEX WINTER is our first 100% recycled collection of long-sleeve running T-shirts. It is made with Neo-Tec, a technical fabric that stands out for its softness and whose particularity is a special weight (140 g/m2), which means greater resistance and also extra warmth.

VORTEX Winter T-shirts are perfect for running in mid-season and at those times of year when temperatures are cool first thing in the morning or last thing in the afternoon.

It is made up of four models with similar designs and different colours: red, blue, black and white. All of them feature a sublimated design on the front that adds a touch of colour, but with discretion and subtlety.

This long-sleeve collection introduces a new unisex pattern that incorporates openings at the sides, giving it a very contemporary look.

VORTEX Winter T-shirts are perfect for running and trail running but they are very versatile technical garments and, therefore, they can also be a great option for other outdoor sports such as trekking, Nordic walking…

This collection has reflective details on the sleeves and also on the back (42K logo) to improve the athlete's visibility when light conditions are poor.

The fabric of VORTEX WINTER T-shirts features latest-generation technologies to guarantee good performance under intensive use: DC4-Long Life Run to ensure the colours do not lose intensity, “DRY-TEC +” to ensure fast drying and “SOFT-LIGHT to ensure softness and prevent chafing.

The unisex ATRIA WINTER collection is made with the Neo-Tec fabric whose main characteristic is its lightness and softness, as well as optimal behaviour in terms of sweat evacuation and drying. It is very comfortable for running but also for other sporting activities because of its good breathability. It is a great option for training when temperatures start to drop and a long sleeve is welcome; it can also be a good option as a second layer over a thermal garment for running when temperatures are cold. Its asymmetric design on the front combines two colours that keep all their vividness thanks to the DC4 technology that guarantees their fixing so they do not lose intensity with washing.