Whoop, the growing fitness subscription service operating out of Boston, is releasing a line of smart apparel that monitors athletic performance. Whoop Body incorporates a set of sensors, called Any-Wear Technology, that connects to the simultaneously released Whoop 4.0, the latest edition of the company’s app-based, round-the-clock digital coaching service. This version of the app monitors blood oxygen levels, skin temperature and sleep cycles in addition to the heart rate. It can “serve as an alarm clock that wakes the wearer with gentle vibrations at a time that it has determined is optimal.” Whoop Body itself, meanwhile, liberates the Whoop system from the old smartwatch-like Whoop Band. There are two Whoop Body collections: Training, comprised of sports bras, compression tops, leggings, shorts and athletic boxers, and Intimates, comprised of bralettes and everyday boxers. Customers purchase these items – for $54 to $109 apiece – in tandem with Whoop 4.0, which entails a subscription of at least $18 per month. Late last month, as we then reported, Whoop’s valuation rose to $3.6 billion through a new $200 million Series E round of financing, led by the SoftBank Vision Fund 2. The plan was and still is to use the new capital to fuel R&D, enter new markets and make acquisitions like its recent takeover of Push, among other things.

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