SAN FRANCISCO - Sustainable footwear brand Allbirds has launched a limited-edition collection of 'sustainable' underwear for men and women.
The new underwear collection features a boxer brief for men and a thong, brief, shortie and bralette for women made with the brand's propriety yarn Trino.
The material, a blend of lyocell fibres, ZQ-certified Merino wool and elastane, was first introduced by the brand in its socks last year.
