Using regular earbuds for workouts can end in disaster—sweat can wreak havoc on non-waterproof models, they can shift out of place or even fall out during intense activity, and they often lack earhooks or stabilizing fins to keep them in place. If you’re looking to upgrade your active listening sessions without spending too much, the Anker Soundcore Sport X10 earbuds are some of the best workout earbuds under $100. Right now, they’re even more affordable during an early Prime Day deal at 50%, bringing their price down to $39.99 (originally $79.99).

Earning an "excellent" rating from PCMag, these earbuds are known for their secure fit, bass-forward sound signature delivered by 10mm dynamic drivers, and reliable active noise cancellation. The earbuds come with powerful, sculpted sound, and they “substantially dial back powerful low-frequency rumble” with their ANC, according to the review. While they're not best-in-class, they’re hundreds of dollars cheaper than premium models, making them a smart option for those shopping in the $50 range. The companion app lets you switch listening modes and customize EQ settings, and offers fitness-focused features like guided breathing exercises for before or after workouts. 

They have an IPX7 rating, meaning they’re built to withstand sweaty workouts, being rinsed under running water, and even underwater submersion for up to 30 minutes. The earbuds last around eight hours on battery, and the charging case gives you an extra 24 hours. Though the swiveling earhook design keeps them in place, pressing the physical buttons—rather than touch controls—lets you control volume, toggle between listening modes like ANC and Transparency Mode, and answer calls. One minor drawback is that while you can skip tracks forward, you can’t navigate back to the previous track. 

If you want a comfortable, secure fit and a sweatproof design paired with a bass-forward sound and effective noise-cancellation without spending a fortune, the Anker Soundcore Sport X10 earbuds are a great workout companion for runners and gym-goers. And at a record-low $39.99, they're one of the better Early Prime Day fitness audio deals available right now.