After quietly testing demand last year, Thirdlove is expanding its activewear assortment through new product innovations. On January 15, the bra brand expanded its TempSync franchise, built around thermoregulating fabric, with an active bra priced at $78 and leggings priced at $88. TempSync uses naturally derived particles infused into fabric to regulate heat and moisture as the body moves. The collection, which is sold direct-to-consumer on Thirdlove’s website, will be promoted through influencers, 3D renderings and editorial-style content focused on product education and lifestyle storytelling. The activewear launch builds on the success of Thirdlove’s TempSync T-shirt bra, which debuted in June 2025 and introduced the technology to the brand’s core intimates business. “The TempSync collection sold $1 million during the first six weeks of launch, which made it clear to us that it was worth exploring more styles,” co-founder Heidi Zak told Glossy.Continue reading this article on glossy.co. Sign up for Glossy newsletters to get the latest on the business of beauty, fashion and pop culture.
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