Built by an angler. For anglers.
No brand deals. No sponsored opinions. Just standardised specs and straight talking.
Where it started
It started, as most things in carp fishing do, with an argument. Not a shouting match, just the quiet, simmering frustration of spending three weeks researching bivvies online and ending up more confused at the end of it than the beginning.
One retailer said the Nash Titan Hide XL weighed 6.2kg. Another said 8.1kg. Nash's own website said something different depending on which page you landed on. Forums had seventeen opinions and none of them agreed. I just wanted to know what the thing actually weighed.
The mistakes that added up
I have been carp fishing for years. I have owned more bivvies than I care to admit and made most of the classic mistakes, bought too light for the sessions I actually do, bought too heavy to carry to the swims I actually fish, bought based on a magazine review that turned out to be written six months before the product was quietly updated.
Every one of those mistakes cost money that could have gone on bait, tickets or better kit.
Why WhichBivvy exists
WhichBivvy exists because nobody else had built what I actually needed. Not a review site that copies manufacturer specs without checking them. Not a forum thread that devolves into brand loyalty arguments. Not a YouTube channel where the presenter conveniently loves every product they review. A proper database. Standardised specs. Honest verdicts. The kind of resource that would have saved me several hundred pounds and a lot of frustration over the years.
How every bivvy gets researched
Every bivvy in the database has been researched properly. Specs are cross-referenced against manufacturer pages, retailer listings and where possible real-world data. Where figures conflict between sources we say so. Where a spec has changed between model years we flag it.
Where a bivvy has a genuine weakness we say that too, regardless of how popular the brand is.
How WhichBivvy works
Three steps, no shortcuts
We find the specs
Every bivvy starts with the manufacturer page. Not a retailer listing, not a forum post. We cross-reference every measurement against at least two sources and flag anything that does not add up.
We standardise everything
Width means external front width. Weight means bivvy only. Hydrostatic head means the fabric rating, not a marketing claim. We use the same definitions across every bivvy so comparisons are actually meaningful.
We tell you the truth
If a bivvy is heavy, we say so. If the waterproofing is only adequate for fair weather use, we say that too. No angler has ever thanked us for telling them a bivvy was great when it leaked on their first winter session.
On independence and affiliate links
How we're funded
WhichBivvy is funded by affiliate commissions. When you click through to a retailer or Amazon and buy something, we may earn a small commission at no extra cost to you. This is how the site pays for itself.
Why it doesn't change our verdicts
Our affiliate relationships do not influence our ratings, our spec data or our verdicts. A bivvy that pays a higher commission does not get a higher rating. A brand without an affiliate programme does not get ignored. The database exists to help you make a better buying decision, and that only works if the information is honest.
Spotted something wrong?
If you spot a spec that looks wrong, a rating that seems off or a bivvy we have missed, get in touch. The database is only as good as the data in it and we would rather be corrected than wrong.