{"id":91254,"date":"2025-07-23T11:35:57","date_gmt":"2025-07-23T09:35:57","guid":{"rendered":"https:\/\/42krunning.com\/deep-collection-the-new-definition-of-a-running-t-shirt\/"},"modified":"2025-07-23T11:35:57","modified_gmt":"2025-07-23T09:35:57","slug":"deep-collection-the-new-definition-of-a-running-t-shirt","status":"publish","type":"post","link":"https:\/\/42krunning.com\/en\/deep-collection-the-new-definition-of-a-running-t-shirt\/","title":{"rendered":"DEEP Collection, the new definition of a running T-shirt"},"content":{"rendered":"

At 42K, we\u2019ve spent years driving textile innovation<\/strong> as the force behind continuously improving our technical apparel collections. We listen to runners, test fabrics, develop patterns, and challenge ourselves to raise the bar with every new running T-shirt collection we launch. <\/p>\n

That\u2019s how DEEP<\/strong> was born: a collection designed to take performance one step further, with brand-new details in our catalogue and a blend of design<\/strong>, technology<\/strong> and comfort<\/strong> that makes it our most advanced option yet for demanding training sessions and races.<\/p>\n

\"DEEP<\/a>
Athletes Soukaina El Khayami and Kike R\u00edos wearing the DEEP Dark Blue model.<\/figcaption><\/figure>\n

DEEP Collection, with two-way stretch and laser micro-perforations<\/h2>\n

DEEP reflects 42K\u2019s determination to keep running towards the future and set the pace for technical innovation in the running world. This new collection of short-sleeve T-shirts, designed specifically for running, is a step forward in performance, comfort and design thanks to two technical innovations<\/strong>: a fabric with two-way stretch<\/strong> that ensures a greater range of motion<\/strong>, plus an area of laser micro-perforations<\/strong> to guarantee excellent <\/strong>breathability. <\/p>\n

The DEEP collection features a relaxed fit<\/em> pattern (relaxed fit)<\/strong> that delivers excellent anatomical comfort<\/strong> for athletes who push themselves to the limit in training and competition.<\/p>\n

Elastter, unrestricted freedom of movement<\/strong><\/h3>\n

At the heart of the DEEP collection is Elastter<\/strong>, the most advanced technical fabric 42K has developed to date. It\u2019s a blend of 88% recycled polyester and 12% spandex\/elastane<\/a><\/strong> (a fibre known for its ability to stretch and return to its original shape without deforming), resulting in an ultralight material<\/strong> with excellent adaptability and outstanding technical performance. <\/p>\n

\"DEEP<\/a>
The DEEP collection is made with Elastter fabric, known for its two-way stretch.<\/figcaption><\/figure>\n

Elastter offers two-way stretch<\/strong> that lets the fabric follow the body\u2019s natural movement without resistance. This ability to stretch in two directions ensures total freedom with every stride<\/strong>, every turn on the route, every change of pace. Whether it\u2019s a long run or a short high-intensity interval, the fabric adapts effortlessly to the athlete\u2019s body, reducing friction and improving overall comfort. <\/p>\n

But what defines Elastter, beyond its flexibility, is its extraordinary softness to the touch<\/strong>. The fabric feels light and silky on the skin, delivering a second-skin sensation that makes a difference in longer sessions. This softness adds comfort<\/strong> and also helps prevent chafing<\/strong>, even in high humidity or heat. <\/p>\n

DEEP T-shirts, thanks to Elastter fabric, deliver a feeling of total freedom, fluidity and lightness<\/strong>, making for a more natural and comfortable running technique. If you want to learn more about Elastter fabric, here\u2019s a detailed article: “Elastter, 42K\u2019s new premium fabric”<\/em><\/a>. <\/p>\n

We can say, without fear of letting any runner down, that the DEEP collection offers total freedom of movement, with no restrictions<\/strong>, thanks to the combination of Elastter fabric and the relaxed fit<\/em> cut.<\/p>\n

DEEP is the second T-shirt collection in the 42K catalogue to use this next-generation fabric; the APEX tank top collection<\/a> was the first to debut Elastter and has already become a bestseller. If you want to check out every APEX model, they\u2019re available in our online shop: APEX collection<\/a>.<\/p>\n

\"APEX<\/a>
Green model from the APEX collection.<\/figcaption><\/figure>\n

Laser micro-perforations, innovation to improve breathability<\/strong><\/h3>\n

The big technical innovation in the DEEP collection is the laser-made micro-perforation zones<\/strong>, strategically placed on the sides of the front of the T-shirt<\/strong>.<\/p>\n

This detail, which represents a major leap forward in 42K\u2019s textile manufacturing technology<\/strong>, significantly improves the breathability of DEEP T-shirts. The micro-perforations increase ventilation capacity<\/strong> right where the body needs it most during a run, supporting thermal regulation<\/strong> and delivering a continuous feeling of freshness<\/strong>. <\/p>\n

\"DEEP<\/a>
The laser micro-perforations in the DEEP collection are placed on the sides of the front panel.<\/figcaption><\/figure>\n

Thanks to this innovation, the DEEP collection becomes an ideal choice for demanding training sessions in high temperatures<\/strong> and for races in the summer months <\/strong>when heat becomes yet another opponent for the athlete. The combination of an ultralight, breathable fabric with an additional ventilation system makes these T-shirts essential allies for running without limits, even on the hottest days of the year. <\/p>\n

A collection inspired by the sea<\/strong><\/h4>\n

The name DEEP is inspired by the depths of the ocean\u2014its apparent calm, its inner energy, and its extraordinary biodiversity. That connection to the marine world is reflected in the colour palette chosen for the three models in the collection: <\/p>\n

DEEP Dark Blue<\/strong>: understated elegance with dark blue tones\u2014refined and intense\u2014that evoke the depths of the deepest waters and convey calm and determination.<\/p>\n

DEEP Mint<\/strong>: visual freshness for those looking for a more vibrant, modern design, with aqua tones reminiscent of the light that filters through tropical reefs.<\/p>\n

DEEP White<\/strong>: a clean, minimalist option inspired by the delicate whiteness of corals.<\/p>\n

Each model is available with a specific pattern for men and women<\/strong>, adapting the fit to each type of athlete\u2019s body. The relaxed fit <\/em><\/strong>cut (relaxed fit), combined with the fabric\u2019s stretch, ensures a fit that\u2019s both comfortable and technical, supporting unrestricted movement without discomfort. <\/p>\n

\"\"<\/a><\/p>\n

Safety in motion: rear reflective detail<\/strong><\/h4>\n

We know many runners train early in the day or at dusk, especially in the hottest months of the year to avoid high temperatures, when visibility can be limited.<\/p>\n

DEEP T-shirts include a small reflective strip on the back<\/strong>, which acts as an extra visibility element<\/strong> in low-light conditions. This simple but important addition boosts safety without changing the garment\u2019s clean, sophisticated design. <\/p>\n

\"DEEP<\/a>
The DEEP collection features a reflective strip on the back.<\/figcaption><\/figure>\n

Technology in the service of performance<\/strong><\/h4>\n

In addition to its next-generation fabric and the inclusion of laser micro-perforations, DEEP T-shirts feature the three most advanced technologies in our catalogue<\/strong> to guarantee maximum performance during use: <\/p>\n