B01 Urban Transit Gear Sling Bag
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✓ 7-day returns
✓ secure checkout
✓ Ships from local warehouse when available
✓ free shipping for all order
✓ 7-day returns
✓ secure checkout
✓ Ships from local warehouse when available
✓ free shipping for all order
Built for faster urban movement. B01 combines X-Pac technical fabric with a detachable aluminum magnetic phone mount, keeping your phone instantly accessible while everyday essentials stay organized inside.
With expandable 2.5L–3.5L storage, Fidlock hardware, YKK zippers and an adjustable shoulder strap, B01 is made for commuting, city exploration and lightweight travel.
*Compatibility: Compatible with the iPhone 12 series and all later iPhone models, including standard and Pro models. Other brands and models are not supported.
Mag Mount Bag Series
B01 Urban Transit Gear Sling Bag
Beyond Storage. Redefining Carry.
Beyond Storage. Redefining Carry.
aulumu Urban Gear Series · Mag Mount Bag
- Insight: From Easy-In to Anytime-Out
Keep your phone within easy reach for navigation, payments, calls, and more. - Innovation: The Mag Mount Bag
A magnetic aluminum compartment moves your phone from inside the bag to outside for faster access. - Impact: Detachable Magnetic Compartment
Detach, access, and snap it back into place—quick, secure, and intuitive.
Less Searching, More Moments
Proprietary Design <Detachable Magnetic Metal Compartment>
Calling, No Searching
Take phone, call, put back, just one hand.
Riding, No disruption
Urban Rides. Easy Navigation.
Detachable Compartment
Detaches in seconds and switches seamlessly between B01 and B02 for quick-access phone carry.
Adjustable Fit. Built for More.
The width of the compartment can be adjusted using the knob to fit the iPhone 12 series and all later iPhone models.
Carry It Your Way
Use B01 as a streamlined sling, or attach the magnetic compartment for quick-access phone carry.
X-PAC® Performance Fabric
Lightweight, durable X-Pac® fabric with reinforced construction for everyday urban carry.
Fidlock® Magnetic Buckle
Magnetic Guidance + Mechanical Locking=Fast and Stable
YKK® Zippers
B01 features YKK zippers to ensure a smooth opening and closing experience even with frequent use.
Phone Out. Life In.
2.5L capacity, perfect for storing frequently used travel items
Multi-Compartment Design, Ready to Go
Expandable Compartment
Expanded Storage up to 3.5 L
Accessory Clip for Everyday Essentials
Attach small essentials for easy access, while the adjustable shoulder strap lets you fine-tune the fit.
Multiple Carry Modes
Adjust the strap for crossbody, shoulder, or close-to-body carry—built to adapt to different looks and everyday movement.
Built for Urban Transit
Matte Black & Glossy Black & Pulse Green
B01 / B02
One magnetic attachment system, two urban lifestyles
- Product Name: B01 Urban Transit Gear Sling Bag
- Material: Nylon, Polyester
- Weight: 400g
- Capacity: ~2.5 L(Unexpended); ~3.5L(Expanded)
- Size: 30.5 cm H × 18.5 cm W × 1.8 cm D (9 cm D when expanded)
- Color: Matte Black, Glossy Black, Pulse Green
- Compatibility: iPhone 12 series and all later iPhone models, as well as the Samsung S25U. It is not compatible with any other brands or models at this time.
FAQs
What is the difference between the B01 and a regular phone pouch?
The B01 is designed to do more than simply hold your phone inside a pouch. It features a detachable magnetic compartment that lets you move your phone from inside the bag to an easily accessible position on the outside. This allows quick access to your phone without repeatedly opening the bag, making it especially convenient for urban mobility.
Can the magnetic compartment be used with the B02?
Yes. The detachable magnetic compartment can be switched between compatible B01 and B02 bags. The B02 is designed for carrying minimal essentials, while the B01 offers more storage for commuting and short trips. You can switch the magnetic compartment between them based on your carrying needs.
Is the phone likely to fall off when attached to the magnetic compartment?
The magnetic compartment is designed with silicone limit structures to help securely hold your phone in place. For everyday use, make sure your phone is properly aligned with the magnetic area before carrying it.
Currently, the magnetic compartment supports the iPhone 12 series and later iPhone models, as well as the Samsung Galaxy S25 Ultra. During strenuous exercise or high-impact activities, we recommend storing your phone inside the bag.
What are the advantages of X-Pac fabric?
X-Pac is a lightweight, water-resistant, and durable technical fabric with a recognizable diamond-patterned structure. It helps the B01 maintain its shape while keeping overall weight low, making it well suited for commuting, everyday carry, and urban outdoor use.
Is the B01 completely waterproof?
No. The B01 is made from water-resistant X-Pac fabric and can handle light rain and everyday splashes. However, it is not fully waterproof because water may enter through areas such as the stitching, zippers, and other structural openings. We do not recommend prolonged exposure to heavy rain.
Who is the B01 suitable for?
The B01 is ideal for city commuters, frequent phone users, everyday carry enthusiasts, and anyone who wants quick access to their phone while carrying more than just the basics. Its expandable storage is suitable for essentials such as a phone, card holder, power bank, earbuds, passport, and compact umbrella, making it practical for commuting, city travel, and short trips.
How should I choose between B01 and B02?
Choose the B01 if you regularly carry everyday items such as a card holder, power bank, earbuds, and compact umbrella. Choose the B02 for lighter outings when you only need essentials such as your phone, passport, and cards.
If your carrying needs change throughout the week, the modular B01 / B02 system allows you to switch the compatible magnetic compartment between the two bags.
Is the B01 strap removable?
The B01 crossbody strap is adjustable but not removable. You can adjust the strap length based on your height, clothing, and preferred carrying position, whether you prefer wearing the bag closer to the body or lower on the shoulder.
Can the B01 be expanded?
Yes. The B01 features expandable storage for greater flexibility when your everyday carry changes. It can hold frequently used items such as phones, passports, cards, change, earbuds, power banks, and other compact essentials.
For clothes, laptops, or larger travel items, we recommend pairing the B01 with a backpack or suitcase.
Which phone models are compatible with the magnetic compartment?
Currently, the Detachable Magnetic Metal Compartment is compatible with the iPhone 12 series and all later iPhone models, as well as the Samsung Galaxy S25 Ultra. It is not compatible with other phone brands or models at this time.
B01 / B02
One Magnetic Attachment System.
Two Urban Carry Styles.
Choose the setup that fits how you move.
B01 is built for commutes, city exploration, and longer everyday carry, while B02 keeps things compact for quick trips with essentials like your phone, passport, and cards.
The detachable magnetic compartment is interchangeable between B01 and B02, allowing you to switch configurations as your everyday carry needs change.