With summer in full swing and high temperatures putting outdoor enthusiasts to the test, staying cool can be just as important as staying dry. That’s where Polartec® Delta™ comes in. Rather than relying solely on moisture wicking technology, Polartec® Delta™ is engineered to work with the body’s natural cooling process, helping wearers stay cooler, drier and more comfortable during high-output activity.
Developed by Polartec®, a Milliken & Company brand and global leader in innovative textile solutions, Polartec® Delta™ is an advanced cooling fabric technology designed to help regulate body temperature during intense activity in warm conditions.
Many traditional performance fabrics are designed to move sweat away from the skin as quickly as possible. Polartec® Delta™ takes a different approach. By carefully regulating moisture dispersion and increasing the amount of fabric in contact with the skin through its unique knit construction, Delta™ allows sweat to remain where it can be most effective, enhancing the body’s natural evaporative cooling process while preventing the saturated, clingy feeling associated with conventional fabrics.
The result is a fabric technology that helps maintain a more consistent body temperature during prolonged activity, while offering exceptional breathability, rapid drying performance and outstanding next-to-skin comfort. Whether tackling mountain trails, fast-paced hikes, summer training sessions or everyday adventures, garments featuring Polartec® Delta™ help wearers remain comfortable even as temperatures climb.
Today, Polartec® Delta™ is trusted by leading outdoor and performance brands to deliver cooling comfort in lightweight apparel designed for warm-weather adventures. Among the brands incorporating Polartec® Delta™ into their warm-weather collections are Haglöfs, THRUDARK and Portal.
Haglöfs L.I.M Delta Tee
Designed for fast-and-light mountain adventures, the Haglöfs L.I.M Delta Tee combines an ultralight construction with Polartec® Delta™ technology to maximise cooling performance without compromising durability. Built for hiking, trekking and alpine pursuits, the tee offers exceptional breathability and moisture management, making it an ideal companion for long days on the trail. The Haglöfs L.I.M Delta Tee is available for men, with a crop version available for women, both retailing at £55.


THRUDARK Oryon Delta T-Shirt Lite
Created for high-intensity performance, THRUDARK’s Oryon Delta T-Shirt Lite utilises Polartec® Delta™ to help regulate body temperature during demanding training and endurance activities. Lightweight, highly breathable
and engineered for unrestricted movement, it’s designed for those pushing their limits in challenging environments. RRP: £65.

Portal Range Lite Tank
For runners seeking maximum ventilation in warm conditions, the Portal Range Lite Tank pairs a minimalist design with the cooling benefits of Polartec® Delta™. Its lightweight construction and highly breathable fabric make it ideal for road running, trail sessions and everyday training, helping athletes stay comfortable as intensity increases. RRP: £75.

While Polartec® Delta™ is an established favourite among outdoor and performance brands, its cooling benefits make it especially relevant during the summer months. Designed to help regulate temperature and improve comfort in warm conditions, it continues to be the fabric technology of choice for lightweight apparel built for hiking, running and other demanding pursuits.
Visit: Polartec.com
