San Francisco bag maker Aer has teamed up with the gear reviewers at Pack Hacker to release the Ultra Sling, a 2‑liter cross‑body bag made for minimalist travel. The limited‑edition piece is built from Challenge ULTRA™ fabric, a high‑tenacity composite that’s both lightweight and abrasion‑resistant.

YKK AquaGuard zippers and Duraflex hardware seal out the elements while keeping weight to just half a pound. The design emphasizes quick access: a wide‑opening main compartment holds a phone, wallet and point‑and‑shoot camera, while a front pocket sorts smaller essentials and a hidden back pocket keeps passports or cash out of sight. Inside, a padded slip pocket protects sunglasses or headphones.

At 9.75 inches long, 5.5 inches tall and 2.75 inches deep, the Ultra Sling carries just enough gear for a day around town or a flight across the country. The minimalist silhouette hugs the body and the adjustable strap allows it to be worn cross‑body or over one shoulder. A muted black exterior and subtle co‑branding let the technical materials speak for themselves. Pricing is set at $99, and because this collaboration is a limited run, the bag sold out quickly upon release.

Aer’s focus on organization and durability has made it a favorite among travelers and commuters, and the Ultra Sling continues that reputation by balancing technical materials with intuitive design. For men who prefer to move lightly without compromising on build quality, this small sling may be the perfect companion for the next trip.