Product details
Invool BB1 bum bag — unisex, beige and adjustable for travel, hiking and running
Want a no-nonsense way to carry the essentials without lugging a bulky rucksack? The Invool BB1 does exactly that. It’s built from tough, water-resistant nylon so it takes knocks and the odd British drizzle in its stride — not a waterproof dry-bag, but more than happy for everyday weather and unpredictable showers.
Practical, simple design
It’s compact but clever. The main compartment will take most smartphones, a small power bank, keys and a wallet, and there are three tucked-away pockets inside for cards, receipts and other little bits so you’re not faffing about hunting for things. The zips glide smoothly and the buckle feels reassuringly solid, so nothing’s likely to pop open mid-run or on a crowded train.
Wear it how you like
The strap is fully adjustable, so you can wear it around your waist, slung across your chest or as a crossbody depending on what suits the day. The full belt length including the bag reaches up to around 48 inches, so it’ll fit most people. Perfect for hands-free days at a festival, a quick cycle or popping out for errands with the dog.
Key specifications
- Material: durable water-resistant nylon
- Dimensions: 8.26 x 5.51 x 1.96 in (20.98 x 14 x 4.98 cm)
- Weight: approx. 120 g
- Adjustable waist belt: up to 48 in including bag
- Model: BB1 • Colour: Beige
Common questions answered: will it keep a phone dry in a heavy downpour? Not completely — it’s water-resistant, not waterproof, so avoid submersion or prolonged heavy rain. Will it hold a large power bank? Most compact power banks will sit alongside a phone, but very large batteries may be a snug fit. All that said, it’s a great little solution for carrying what you need comfortably and securely without overpacking.
Ideal uses
- Day hikes and countryside strolls when you only need the essentials
- Travel and sightseeing — passports, tickets and cards kept close
- Running and cycling when pockets aren’t an option
- Festivals, markets and city errands for proper hands-free convenience
All in all, the Invool BB1 is a practical, no-fuss companion for leaving the house light. It’s sturdy enough for the outdoors and neat enough for travel, and with a few colours available it’s easy to pick one that suits your style. No complicated setup — clip it on and you’re off.








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