Polartec, the Lawrence, Mass.-based provider of innovative fibers and fabrics, is bringing back its Polarfleece brand.

The company is also introducing MtnLogic, a top-of-the-mountain apparel brand developed in collaboration with world-class alpine climbers and guides.

When Polarfleece was invented in 1981 by predecessor company Malden Mills, the fabric became known for its lightweight warmth and comfort for the outdoors. The company believes that while its invention has been copied by many, the fabric’s soft hand, quality knitting, warmth and lightweight durability have not been matched.

“Polartec fleece is the product that started it all and is still the premium standard,” said Gary Smith, Polartec’s chief executive officer. “Relaunching the Polarfleece brand is an opportunity for us to bring consumers a customized full garment that is 100 percent made in America.”

Polartec is bringing back the Polarfleece brand starting with the Polarfleece Pullover, which pays homage to the original article of 1981. The Polarfleece Pullover is a modern update that combines the Polartec Classic 200 Series Fleece and Polartec Power Stretch with Polartec Hardface reinforcement in the collar, pocket, waist and cuffs.

Custom Polarfleece Pullovers will be available for purchase at the Outdoor Retailer Winter Show that opens on today in Salt Lake City, made to order and sewn in the Polartec booth. Special pricing at Outdoor Retailer is $50 and all proceeds from sales at Outdoor Retailer will be donated to Big City Mountaineers, a nonprofit mentorship program that helps urban youth explore nature.

For MtnLogic, Polartec worked with Peter Whittaker and the guides at RMI Expeditions to develop a full range of apparel solutions.

“The partnership with Polartec is a natural one,” said Whittaker, MtnLogic founder. “To build the best workwear, we needed the best materials. The innovation and engineering from Polartec aligns with our solutions-based approach.”

The MtnLogic collection containing 19 styles — developed by more than 60 RMI guides during a 12-month development timeline testing 7,000-plus pieces of apparel through more than 1.2 million vertical feet of climbing — will also be unveiled at the 2017 Outdoor Retailer Winter Show. The MtnLogic collection will become available to consumers April 15 on Mtnlogic.com, as well as at Whittaker Mountaineering at the base of Washington’s Mt. Rainier.

Polartec products range from lightweight wicking and cooling fabrics to insulation and weather protection textiles, and are utilized by leading consumer brands, the U.S. military and other global militaries, flame resistance, workwear and contract upholstery markets. The company changed its name to Polartec from Malden Mills in 2007.

In 2015, Polartec said it would be winding down operation at its historic mill in Lawrence and consolidate its U.S. manufacturing in Hudson, N.H., at its United Knitting plant, and Cleveland, Tenn., where it operates Polartec Tennessee Mfg.