Quick answer

Choose the Rains Bum Bag Mini for a compact, waist-worn carry that keeps essentials at your hip. Pick the OTG Messenger Bag when you need to carry a laptop or tablet and prefer a crossbody shoulder bag with organized pockets.

Size and capacity: what fits where

The Bum Bag Mini is designed for the absolute essentials: a card, key, and phone. Its single main compartment and coated zip closure keep items dry and accessible, but there is no room for a tablet or larger items. The OTG Messenger Bag, on the other hand, includes a padded 14-inch laptop sleeve and two slip pockets, making it suitable for professionals who carry tech to work or meetings.

If your daily load is just a phone and wallet, the Bum Bag Mini is sufficient and more streamlined. If you need to bring a laptop or tablet, the OTG Messenger Bag is the practical choice.

Carry style: waist vs crossbody

The Bum Bag Mini fastens with an adjustable webbing strap worn around the waist or across the body. This keeps the bag close and secure, ideal for active commutes, cycling, or crowded transit where you want your hands free and your valuables in front of you.

The OTG Messenger Bag uses a large flap with a C-clip closure and a shoulder strap designed for crossbody wear. It sits at your side and allows quick access to the main compartment without removing the bag. This style is more familiar for office commutes and everyday errands where you need to reach inside frequently.

Waterproof design: both keep your gear dry

Both bags are built with Rains' signature waterproof fabric and taped seams, so rain and splashes won't soak your belongings. The Bum Bag Mini's coated zip closure adds an extra seal for the main compartment. The OTG Messenger's large flap overlaps the opening, providing additional protection against sideways rain.

In heavy downpours, either bag will keep your essentials dry, but the messenger's flap design offers a bit more coverage for the zipper area.

Trade-offs at a glance

  • Bum Bag Mini: compact and waist-worn: Holds only a card, key, and phone. Best for minimalists who want a small, secure bag that stays put during movement.
  • OTG Messenger Bag: laptop-ready crossbody: Offers a padded 14-inch laptop sleeve and organized pockets. Better for those who carry tech and need quick access while on the go.
  • Waterproof performance: Both bags use Rains' waterproof fabric and taped seams. The messenger's flap adds extra rain coverage; the bum bag's coated zip keeps the main compartment sealed. In heavy rain, the messenger's flap offers more protection for the zipper area.

Product facts

  • Bum Bag Mini: Bum Bag Mini is a downscaled version of Rains' signature Bum Bag, designed to fit card, key, and phone. If you carry only the basics, this bag gives you a compact, waterproof waist pack without extra bulk.

    Bum Bag Mini

    Bum Bag Mini

  • OTG Messenger Bag: OTG Messenger Bag features a padded 14-inch laptop sleeve and two slip pockets inside the main compartment. You can safely carry a laptop or tablet along with documents, making it a practical choice for work or study commutes.

    OTG Messenger Bag

    OTG Messenger Bag

Which should you choose?

Best for

  • Minimalists who only carry a phone, card, and keys
  • Cyclists or commuters who want a secure waist bag that won't swing

Not for

  • Anyone who needs to carry a laptop or tablet
  • Those who prefer a shoulder bag with easy access to multiple compartments