US industrial workwear maker Riverside Manufacturing Company is to be sold to private equity firm Resilience Capital Partners for an undisclosed sum.

Riverside is Resilience's first add-on acquisition by its Affinity Specialty Apparel investment platform, which it acquired in December last year.

Affinity Apparel sells and distributes occupational apparel and services through managed direct purchase uniform programmes. Financial terms of the deal were not disclosed.

The move comes three months after Riverside put its sewing equipment, parts, fabrics and apparel worth millions of dollars up for auction, following the company's decision to close its US sewing, cutting and warehousing operations in Georgia.

"Acquiring Riverside, with its tremendous position in the protective apparel marketplace, strengthens our competitive position in the direct sale uniform business and takes us one step closer to our long term objective of creating an industry leader in the sector," said Affinity Apparel CEO Michael DiMino.