Waterfly ONJ02 Dark Grey Large Waist Pack – Multi-Pocket Bum Bag (Unisex)

Waterfly bum bag: large dark grey waist pack for hiking and travel

Simple, practical and properly useful — this Waterfly bum bag is the sort of kit that makes days out less faffy. If you’re tired of juggling a bottle, phone and keys or rummaging through pockets, this keeps everything tidy and within reach. It isn’t flashy, but it’s dependable: a padded back for comfort, a reflective tab for evening runs and room for a standard 500 ml bottle all make a noticeable difference.

What it is and who it’s for

A lightweight, unisex waist pack made from water-resistant nylon, designed for runners, hikers, cyclists, dog walkers and anyone who likes to travel light. The adjustable strap extends from 41 cm up to 132 cm, so it suits small to large waists — wear it on the waist or sling it across your body when you want hands-free access.

Key features and why they matter

• Five zippered compartments: keeps items separated so keys, wallet and phone don’t rattle together. The main pocket has a roomy inner section that will hold a 500 ml bottle; the middle pocket includes smaller slots for phone and cards, and the front pockets give quick access to essentials.
• Water-resistant nylon outer: helps protect your gear from light rain and splashes — handy on changeable walks or sweaty gym sessions.
• Breathable padded back: reduces rubbing and helps manage moisture. That extra cushioning is noticeably more comfortable on longer outings.
• Adjustable nylon belt with reflective tab: fits waists 41–132 cm and adds a bit of visibility for runs or rides in low light. The buckle is sturdy and built for frequent use.
• SBS zippers and robust hardware: chosen for longevity so the bag stays reliable after repeated opening and closing.
• Lightweight and compact: weighs roughly 190 g, so it won’t feel like extra luggage but still carries the essentials.

Practical use cases

Ideal for a morning jog when you only need a phone, keys and a bottle; for a lightweight day hike; for cycling or commuting when quick access to travel cards and snacks matters; or for festivals and markets when hands-free is essential. No more digging through a rucksack for small bits and bobs — everything’s easy to reach.

Technical details

• Material: water-resistant nylon with breathable mesh back pad.
• Dimensions (approx): 29.4 x 20 x 3 cm.
• Weight: approx 190 g.
• Waist strap range: 41–132 cm (16–52 inches).
• Holds standard 500 ml bottle in main pocket.
• Brand/model: Waterfly ONJ02.

Some users ask about RFID-blocking or extra security features; this model is focused on organisation, comfort and weather resistance rather than specialised anti-scan pockets. If RFID protection is a must, it’s worth checking Waterfly’s range for models that include it. Otherwise, this is a solid, no-nonsense bum bag that does what it’s meant to — and will probably become your go-to for everyday outings.