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Overall, global production of cellulose-based fibers including lyocell, modal and cupro grew more than 10% to 7.2 million tons in 2022, according to the nonprofit Textile Exchange.

Uniqlo has expanded its AIRism line using super-fine, smooth fibers made from polyester and cupro, which is made from cotton waste, that it says dry quickly and feel cool.

From left: Melitta Baumeister cotton blend shorts, $480 at Totokaelo, totokaelo.com; Wales Bonner cupro blend shorts, $525 at Totokaelo, totokaelo.com; Martine Rose cotton cargo shorts, $610 at La Garçonne, lagarconne.com; Marques’ Almeida denim shorts, $350 at La Garçonne, largarconne.com.

Cupro, for example, is a regenerated cellulose fiber made from cotton linter — the silky fibers that stick to the seeds of the cotton plant after it has been ginned.

The collection culminated with silken suits with a comfy pajama feel made out of cupro, a regenerated cotton fiber often used as a silk substitute, and paired with flip-flops.