I've been testing outdoor packs for years, and the waterproof bum bag，waist bag with water bottle holder，waterproof waist bag for swimming from Hanyang Pet Supply keeps popping up in my kit rotation — mostly because it balances utility and low fuss. To be honest, it’s rare to find a waist pack that handles both a river crossing and a long ride without rubbing or sagging.

What it is (short)

This is a tactical-style fanny pack designed for hiking, mountaineering, camping, riding, fishing and even swimming. Made mainly of nylon with options for TPU coatings and custom printing, it includes a dedicated water bottle holder and claims waterproof performance suitable for wet-weather use.

Product specifications

Process flow — from roll to ready pack

In practice: select nylon fabric → apply TPU or PU coating → laser cutting or die-cutting → stitch main panels → RF/ultrasonic weld or seam tape critical seams → install water-resistant zippers, buckles and bottle holder → quality testing → packaging. Sounds simple, but small process controls (seam sealing technique, zipper tape prep) make or break waterproof claims.

Testing, standards & service life

Typical tests performed: ISO 811 (hydrostatic head), AATCC 127 (water repellency), IEC 60529 for IP ratings where applicable, and zipper cycle tests (often ≈10,000 cycles in lab conditions). Real-world service life depends on use; expect around 3–7 years for regular outdoor use — however, saltwater, sun exposure and abrasion will shorten that.

Who uses it (scenarios)

• Trail runners and day hikers who want hands-free hydration
• Kayakers and swimmers needing a dry pocket for phone/wallet on short crossings (note: not a submersible dry bag)
• Fishing and cycling — bottle holder is a practical addition

Vendor comparison

Customer feedback & quick take

Many customers say the pack is comfortable and the bottle pocket stays stable even on rough trails. A few note that "waterproof" is best read as heavy rain protection, not scuba-grade submersion. If you plan to swim with it, use it for surface swims or keep electronics in a dedicated dry insert.

Final thought: if you want a practical, customizable waterproof bum bag，waist bag with water bottle holder，waterproof waist bag for swimming that’s factory-order friendly and field-ready, this is worth sampling. I’ll probably keep one in my daypack for weekend trout runs.

References

1. ISO 811 — Textile fabrics — Determination of resistance to water penetration (hydrostatic pressure).
2. AATCC Test Method 127 — Water resistance: Hydrostatic pressure test.
3. IEC 60529 — Degrees of protection provided by enclosures (IP Code).