Quick Summary
The Waterfly bum bag is a waist pack with a water bottle holder and multiple compartments. It is described as an adjustable walking and running bag, with space for an 18 oz / 500 ml bottle and everyday carry items such as a phone, keys, cash and cards.
The bag is also described as lightweight, with an empty weight of 210 g, and it has reflective strips plus an adjustable belt with a 50-125 cm range. Those details make the fit, bottle size and storage layout the main points to check before choosing it.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Waterfly. Useful for identifying the exact product family. |
| Product type | Bum bag / waist pack with water bottle holder. |
| Bottle capacity | Expandable to hold an 18 oz / 500 ml water bottle. Check your bottle size against this. |
| Weight | 210 g empty. A useful check if you want a lighter waist pack. |
| Strap adjustment | 50-125 cm. Compare this with your waist size before buying. |
| Compartments | Up to 5 compartments for carrying small essentials. |
| Material | Nylon. |
| Visibility detail | Reflective strips are described for night-time visibility. |
What to Compare Before Buying
- Bottle size: The holder is described for an 18 oz / 500 ml bottle. Check the bottle you plan to carry.
- Waist fit: The adjustable belt runs from 50-125 cm, so the fit depends on your waist measurement.
- Storage layout: It has up to 5 compartments, which matters if you want separate spaces for small items.
- Carry weight: The empty bag weighs 210 g, so compare that with how much weight you are willing to wear at the waist.
- Visibility detail: Reflective strips are included, which may matter if low-light visibility is important to you.
Who This Product May Suit
This waist pack may suit buyers who want a compact way to carry a bottle and a few small essentials at the waist. It is relevant for walking, running, hiking, cycling and similar activities where hands-free carry matters.
When to Consider a Different Option
A different option is worth considering if you need to carry a bottle larger than the stated 18 oz / 500 ml size, or if your waist measurement sits outside the 50-125 cm adjustment range. Buyers needing a larger storage layout should also compare larger packs.
What Is Included
The bag includes a water bottle holder style waist pack. The bottle itself is not included.
Before You Decide
Check the bottle size, the 50-125 cm belt range and the compartment layout before choosing an offer. Confirm whether you want a waist pack that includes a bottle holder rather than a general belt bag.
