Guide & Tool: How to choose the right carp bivvy (plus a free spec comparison tool)

Tips & Guides
1

Hi everyone,

Choosing a new bivvy can be a bit of a nightmare. Between all the jargon—Hydrostatic Head (HH) ratings, quick-erect hubs, pram hoods, twin-skin caps, and varying internal dimensions—it’s easy to spend hours jumping between tackle shop websites trying to figure out what actually fits your fishing style (and your bedchair!).

I wanted to share a quick checklist of key specs to look out for when picking a shelter, along with a free tool I built to make comparing them side-by-side much easier.

1. Hydrostatic Head (HH) Rating

  • What it means: Measures how waterproof the fabric is under pressure.

  • Guide:

    • 5,000mm – 10,000mm: Decent for spring-to-autumn sessions or quick overnighters.

    • 15,000mm – 20,000mm+: Ideal for year-round UK angling and harsh winter downpours.

2. Setup Style: Quick-Erect vs. Pram-Hood

  • Quick-Erect (e.g. Trakker Tempest, Fox Frontier): Great for short sessions, quick moves, or arriving after work in the dark.

  • Pram-Hood (e.g. Nash Titan, Sonik SK-Tek): Rock-solid stability in high winds and often gives better head clearance and internal volume for longer sessions.

3. Internal Footprint vs. External Size

Always check internal floor dimensions rather than overall footprint, especially if you use a wide or XL bedchair. Pay close attention to the peak height if you don’t fancy crouching down every time you sit up!

A Free Tool to Compare Specs Side-by-Side

To save myself and fellow anglers from opening dozens of browser tabs, I created WhichBivvy.co.uk.

It’s a completely free comparison tool for UK carpers where you can:

  • Filter bivvies by capacity (1-man vs 2-man), budget, or brand (Fox, Trakker, Nash, Avid, Sonik, etc.).

  • Compare weight, HH ratings, and dimensions side-by-side.

  • Use the ‘Bivvy Finder’ quiz to narrow down what suits your typical session length.

I’m constantly updating the site, so if you give it a spin, I’d love to hear your thoughts!

  • What bivvy are you currently running on the bank?

  • Are there any key specs or newer bivvies you’d like to see added to the comparison tool?

Tight lines!