You Are Reading Reviews for Six Different Bags

Start with the thing that explains most of the contradictions on this page. Singwow sells this bag in six variants under a single listing, and Amazon pools the reviews across all of them. At least four of the 100 most recent reviews describe a bag that is not the 500L 2-pack. Richard Riley's three-star review opens by saying he bought a twin pack of 300 litre bags. Sally Hughes, at two stars, is comparing two sizes in one review: the 500L was "perfect", the 270L "not good at all" with a weave that was see through in places. If you are skimming star ratings here, you are reading a blend of six products.

The size chart on the listing images sets out what each option is. The 120L is 45 x 76cm and rated to 30kg. The 270L is 67 x 76cm at 50kg, the 300L is 67 x 84cm at 70kg, the 400L is 80 x 80cm at 85kg, and the 500L reviewed here is 80 x 100cm at 100kg. There is also a 500L double-bottom version at the same dimensions rated to 135kg, which matters further down.

Those numbers are worth testing against one of the complaints. Douglas R. gave two stars and wrote that the "Package says 400litre bags but measurements indicate actually 120 litre bags". Run the maths on the listed 400L dimensions and a cylinder 80cm across by 80cm tall holds roughly 402 litres, so the label and the tape measure do agree on paper. A bag that arrived without its hoop, or one that never opened out to full height, would measure short. That is a real problem, just not the one the review names.

The Hoop, the Handles, and the Bags That Arrived Wrong

The fabric is 140 g/m² woven polypropylene, water-repellent rather than waterproof, with reinforced edging around the base that the listing dates to a July 2026 upgrade. What holds the mouth open is a flexible plastic hoop threaded into a stitched channel at the rim, and it needs fitting the first time you use the bag. William Bradshaw Amos, five stars, describes it as "a springy plastic strip threaded into a stitched channel around the opening", and puts the mouth at 30 inches, or 76cm, across. That is four centimetres under the 80cm on the spec sheet, which is what you would expect from a hoop sitting inside a sewn channel.

Once it is in, the bag stands up on its own and stays open while you fill it, which is the whole point of paying for a woven sack rather than a bin liner. drgas cleared two thirds of a garden using four of them and rated the tensioning loop as the reason filling was easy. KUNIJ was less sold on the self-standing claim, reporting that the bags do not quite stay upright empty but hold their shape once there is something in the bottom. Fitting instructions are the weak link: one five-star buyer still could not work out what the spare fixtures in the pack were for.

Five of the 100 reviews report something arriving wrong, which is a real rate on a product this simple. Richard Riley's twin pack was short a hoop: "One of the bags had the hoops enclosed, the other was missing them", which left him opening the bag by hand every time he wanted to put something in it. Irene Fulton bought four, found faulty stitching on one and a side that looked scorched. The remaining three are a weave thin enough to show daylight through, reported twice, and the mislabelled pack above. That reads as loose factory inspection rather than a design flaw, and it is worth checking both bags on arrival while the return window is still open.

Nine Split Bags, and What Went Into Them

Nine of the 100 most recent reviews report a bag holing, splitting or ripping. That is the largest single failure cluster in the set, and what makes it useful is that most of those reports say what was inside at the time.

Thorny and woody prunings account for most of them. One four-star buyer got through everything except one shrub, reporting that the bags handled most garden debris "other than pyracantha which put holes in the bags on the very 1st use". Mike, at two stars, hit the same wall with conifer, finding that "holes appeared in the bottom after just one use (leylandii cuttings)". William Bradshaw Amos, the same five-star reviewer with the tape measure, had already predicted it, warning that the fabric would be "torn to pieces by stuffing thorny stems such as bramble" into it.

The second failure mode is the base seam under dense loads. Philippa Duffus, one star, put six spade-loads of stones and soil in and found "a large hole around the bottom seam... everything fell out". Sharp rubble is the one load the listing rules out by name, and stones sit close enough to that line for the bag to have been outside its brief. It is also exactly what plenty of people buy a 100kg-rated sack for, and a seam going on the first outing is a fair thing to be cross about.

Merv, five stars, lands where the evidence does: "they do get holes in them if you abuse them too much", and he has used his several times regardless. One caveat on timing. The listing describes the reinforced base edging as fully upgraded in July 2026, and a review page never tells you when a bag was bought, so an unknown share of these splits will be pre-upgrade stock. Treat that as context rather than an all-clear.

Leave One Standing in the Sun and It Rots

Only two of the 100 reviews raise sunlight, and both deserve more weight than that count suggests, because nothing on the listing claims UV resistance. Water-repellent is the only weather claim Singwow makes. One three-star buyer found out the expensive way, reporting that he "used one as a BBQ cover and it's rotted out in one summer". Martin Turner, two stars, put it in one line: "Tends to disintegrate if left out in the sun otherwise ok."

A BBQ cover is not what these were sold for, but the point generalises to how most gardens actually use them: filled in March, left standing by the shed, still there in September. Woven polypropylene without a UV stabiliser goes brittle after a season of that, and a brittle bag tears the moment you lift it.

It probably explains the widest split in the whole pile. Lindsey, one star, reported that "within 12 months of purchase they had completely fallen to bits" and could not move a half-full bag without the fabric tearing, measured against other garden bags that had lasted ten years. Against her, Renees at five stars has "Had years of use out of them", and a reviewer posting as coin magnet has been ordering multiples for the past couple of years to store logs for the wood burner. Same bag, wildly different lifespans, and where they were kept between jobs is the most plausible reason.

Getting a Full One to the Tip

Ten of the 100 reviewers raise the size or the weight, and not one of them is saying the bag is badly made. They are saying that 500 litres of garden waste is a lot of garden waste. Mr M., five stars, sets the practical limit: fill one completely and "you’d probably need a small van rather than a car to move them". IDABL, also five stars, reports that they can only be "filled to about ½ way before they become too heavy to handle".

The counter-evidence is real. One five-star buyer filled both to capacity and fitted them "into the back on my Nissan Juke easily ( with the back seats down).." and drgas found a full bag could be lifted by the grab handles "by one tall person or two shorter ones". The difference is what went in. Dry leaves fill the full 100cm height and weigh next to nothing. Wet grass, damp soil and dense hedge cuttings reach the carrying limit long before the bag is full, which is why the listing quotes 100kg as a load-bearing figure and then says plainly that this is not the same as a comfortable carrying weight.

Steve Smith's four-star review is the one to read before ordering. He found plant cuttings too heavy to carry and reckons "Fallen leaves might be ok, provided they are not wet". The two lower handles are what rescues this: they let you tip a load into a boot or a green bin rather than lift it clear of the ground, and several reviewers name those grab handles as the best feature on the bag.

So if you are clearing on your own with a hatchback on the drive, buy Singwow's 300L bags instead: 67 x 84cm, rated to 70kg on the same size chart, and the size Steve Smith points at when he signs off "try the smaller sizes". You give up headroom and nothing else.

Which of the Six We Would Actually Put in the Basket

We score the Singwow 500L 2-pack 4.3 out of 5. The working: the 100 most recent UK reviews average 4.48, a shade above the 4.4 lifetime badge earned across 3,692 ratings, which is an unusual direction for a bestseller to move in and a good sign for anyone buying now. Seventy-five are five stars, 11 four, five three, five two and four one. What holds our number just below the badge is not the bags that work, it is the five in 100 that arrived faulty and the total absence of a UV claim on something designed to sit outdoors.

Buy them for what they are built for: hedge trimmings, prunings, grass, leaves and a full autumn clearance in a garden that makes more waste than one council bin will swallow. At 80 x 100cm each and folding flat to nothing between jobs, a pair replaces an awful lot of splitting rubble sacks. Mark Lemon, five stars, made the comparison directly, finding them easier to fill and carry than the big white builders bags he used before.

Skip this size if you are bagging soil, stones or rubble, if brambles and pyracantha make up the bulk of what you cut, or if you are working alone out of a small boot. If a previous bag went at the base seam, the 500L double-bottom on the same listing is the variant to pick: identical 80 x 100cm footprint, an extra base layer and a 135kg rating instead of 100kg. Fold them into the shed when they are empty, keep the wet stuff to half height, and there is no reason a pair should not see out several seasons. Check the current listing on Amazon for the full range of sizes.