Errant Sling, X-Pac Jet Black

Boundary Supply Errant Sling — The Stormproof Sling for Urban Nomads Who Never Stop Moving

The gist: A 15L shoulder sling with waterproof zippers, magnetic compression sides, and a quick-swing buckle built for commuters and travel days in any weather.

• Stormproof build: YKK Stormproof zippers and weatherproof Bluesign®-certified fabrics seal out rain without a separate cover — ready for unpredictable city days.
• 13” padded laptop sleeve: Dedicated Nywool-lined sleeve (14” max) keeps your laptop protected and separate from daily essentials at just ~1.75 lbs empty.
• Magnetic compression sides: Built-in magnets collapse the bag when partially filled, so it maintains a slim profile even on light packing days.
• Swing-access buckle: Fit lock at the base lets the bag swing to your front without removing it — fast and secure on transit, bike commutes, or busy streets.

UrbanCred called the Errant Sling “a highly recommended bag,” specifically praising the Fit lock for “easy access while still offering increased security” — a useful feature for travelers moving through crowds.

Best for: Minimalist travelers and digital nomads who want a hands-free, weatherproof sling that carries a laptop and a day’s essentials. Skip it if: Your laptop is 15” or larger — the sleeve maxes at 14”. Runs ~$152 open-box, ~$289 for the X-Pac version — check the current price before buying.