The same kilogram of raw material can be foamed into a small block or a big one. The more it expands, the more volume you get, the lower the cost, and the coarser the cells inside.

How much it expands is the expansion ratio. A lower ratio means more material packed in, finer cells, and a mat that is harder to flatten.

Most XPE on the market is 35×. Our Advanced mat uses 30×. Those 5 points make a real difference underfoot and in durability.

The price gap comes from here too. EPE costs roughly half as much to foam as XPE, and we know that for certain because we foam both ourselves. So the Essential mat is cheaper because the material is different, not because corners were cut.

You do not have to take our word for it; look at a cross-section yourself. One warning first, though, because it will mislead you:

When you cut it open you see a few faint lines: those are where the layers of the multi-layer structure join. We heat-bond them, fusing layer to layer with heat, with no glue.

Honestly, though, you cannot easily tell heat-bonded from glued layer lines in a photo. So we will not ask you to judge by that. Ask the seller how the layers are joined; it is quicker.

It happens, but it depends on the material.

Once EPE is compressed it does not come back. This is not a quality issue but the structure of the material: a burst cell is burst and cannot recover. A 4 cm EPE mat walked on daily with furniture on it is often under 3 cm a year later.

XPE has fine cells and thick walls and springs back when pressed. The 30× XPE sample we kept still measures 4 cm after five years.

That is our own long-term record, not lab data. You can measure yours too: a ruler at all four corners beats anything else.

Three mats have it; the Essential does not. No dancing around it: it comes down to the flame resistance test.

We test to the toy standard, because it is the strictest and because children lie on the mat all day and put the corners in their mouths. The Essential mat's heavy metal, plasticiser, formamide, mechanical and physical tests were all submitted and all passed.

Only flame resistance was not submitted, because we knew it would not pass. XPE, iXPE and POE are dense enough to pass on their own; EPE has a high expansion ratio and an airy structure, so it burns fast by nature.

The only way to get EPE through is to add flame retardants, which are extra chemical additives.

The foam decides feel and durability, but the skin is what gets touched, crawled on and wiped every day.

The Essential, Advanced and Premium mats use water-based antibacterial PU. Water-based means no organic solvents in the process, which is also why our mats have almost no smell.

The antibacterial figures were measured on the skin material itself: under GB/T 31402-2023, over 99.9% against E. coli and Staphylococcus aureus and 99.7% against Candida albicans. Report numbers and details are in the testing section below.

The Signature Cloud-Soft mat has the same water-based antibacterial PU with an extra layer of silicone on top: gentler on skin, plusher and silkier, and more durable and resistant to ageing.

Both skins can be replaced on their own, so a tear does not mean buying a whole new mat.

The first three mats are all foamed PE, differing in expansion ratio and cross-linking. Cloud-Soft is different: POE is not PE at all.

It is a polyolefin elastomer, and the raw material itself costs far more. So Cloud-Soft is expensive mainly because of the material, not the foaming process. For the same reason it is what premium mattress support layers and running shoe midsoles use.

Underfoot that means support, rebound and cushioning all at their best at once; the other three each trade something off, POE does not.

And both layers of Cloud-Soft are different. The core is POE, and the skin adds a silicone layer over the water-based antibacterial PU.

The children's play mat (five-fold seamless) carries the ST safety toy mark, certificate 114-G12592-40999, valid until 16 October 2028.

Issued by the Taiwan Toy and Children's Products R&D Center (TCC), report 11410079CSB511-1, assessed as compliant.

The ST mark covers the Advanced (XPE), Premium (iXPE) and Signature Cloud-Soft (POE) mats. The Essential (EPE) is not included, but to be clear: apart from flame resistance, every test was submitted and passed for the Essential mat; the only difference is that one test, explained in the section on why the Essential has no ST mark.

Formamide is the substance most often discussed for foam mats. The CNS 15493 limit is 200 mg/kg; our foam tested as not detected (method detection limit 1 mg/kg).

The iXPE raw material also has a separate CTI report (A2260018620101001C), testing formaldehyde under EU Toy Safety Directive 2009/48/EC and formamide under GB/T 42805-2023: both not detected.

The Essential EPE, Advanced XPE and Premium iXPE mats have rows of ventilation holes along the sides so air can circulate inside the mat; the difference is most noticeable when it is stored standing against a wall.

All the holes are on the sides. The surface you step on and wipe is still one solid piece with no openings, so crumbs cannot fall in and there are no little holes you cannot clean. The Signature Cloud-Soft (POE) keeps its silicone-wrapped edge with no ventilation holes.

The upgrade is rolling out gradually and the version shipped depends on stock; message us before ordering if you specifically want the ventilated version.