Minus33 is an American company founded in New Hampshire by L.W Packard & Co. in 2001.Minus33 is claimed to have 100 years of textile manufacturing experience behind it in parent company L.W. Packard & Co.The company makes products primarily from superfine merino wool.Minus33 claims that this wool makes its products itch-free and resistant to shrinking. Minus33 also claims merino wool to have moisture wicking and antimicrobial properties, reducing odor.Reviews for Minus33 products are typically found in the context of equipment for hiking and other outdoor activities. Minus33 was featured on New Hampshire TV station WMUR channel 9 in January 2015, highlighting L. W. Packard & Co. Inc.'s 100 years of manufacturing contributions to the success of the company. In 2001, the history of L. W. Packard and startup of Minus33 was part of an interview on New Hampshire Public Radio.

Since 2016, Minus33 has been a sponsor and wool clothing supplier for both the United States Men's and Women's Olympic luge teams.