The edge that curls on the t-shirt
Short answer: The hem rolls because the fabric is knitted in single jersey. That is the nature of the fabric and not a fault, but a denser knit rolls less, and a stitched hem holds its shape better than a raw edge.
How jersey behaves
Single jersey is knitted with loops that face one way on the front and another way on the back. That difference creates tension in the fabric, which pulls the edge towards one side. This is why an unstitched edge nearly always rolls. It comes from the knit itself, not the yarn.
Interlock does not roll
A double knit quality such as interlock has matching loops on both sides. The tension evens itself out, so the edge stays flat. The fabric is a little thicker and less light in return. To learn more about the qualities, read single jersey, interlock and rib explained before you choose.
The hem on the shirt
When the edge is folded and stitched, it rolls less because the seam holds the fabric in place. A raw edge, where the fabric is simply cut, rolls more and can become more visible over time. Some styles are made that way on purpose, but if you dislike it, look for a stitched hem.
After washing
If the hem rolls more after washing, the shirt may have been tumble dried or washed too hot. Heat makes the fibres contract slightly, which adds to the tension in the edge. Dry the shirt hanging and ease it into shape while damp. See the washing guide for the rest.
Ironing
A little steam on low heat can lay the edge flat again, but only for a while. After the next wash it usually rolls slightly again, because the tension is still in the fabric. Use a cloth between the iron and the shirt, and do not stay in one spot. See also does bamboo clothing need ironing.
See the range
If you want an everyday shirt where you never think about the hem, read the description of hem and knit on each style. Many basics have a stitched hem at the bottom and on the sleeves. Browse the basics in bamboo T-shirts for men, where you will find several qualities.
For women
The same applies to T-shirts for women. A thin, light quality drapes softly but rolls more easily at the edge than a heavier one. Choose based on how you plan to wear the shirt and whether it should be loose or close fitting. See the matching styles in bamboo T-shirt for women.
Where it matters most
On a T-shirt worn on its own, a rolling edge is easy to see, especially at the bottom and on the sleeves. Under a shirt or jumper it does not matter, because nobody sees it and it lies flat against the body. A thin quality often works best there. See bamboo undershirt for men.
When the edge matters to you
If a completely flat edge is important to you, choose a style with a stitched hem in a denser quality. If the description mentions interlock or a heavy jersey, the edge will roll less. It is about choosing the right quality from the start, because the edge cannot be changed later.
Caring for the shirt
The best way to keep the hem neat is a gentle wash, hanging to dry and no tumble dryer. That way the fabric keeps its shape longest. Smooth the edge lightly when you hang the shirt and let it dry in peace. It takes a moment and makes a clear difference over time.
Frequently asked questions
Are rolling edges a fault?
No. It is a property of single jersey that comes from the way the fabric is knitted. Every shirt in that quality will roll slightly at an edge that is not stitched.
Which quality does not roll?
Interlock, which is double knitted, does not roll because the loops match on both sides. A stitched hem in a heavy jersey also rolls far less than a raw edge.
Can I get the edge to lie flat again?
A little steam on low heat will lay the edge flat for a while. It only lasts until the next wash, though, because the tension remains in the knit itself.
You can find the full range at Bamboo-Clothing.com.
