Ring Spun vs Open End Denim: How Yarn Changes Hand Feel, Strength and Price

Ring spun vs open end denim: the short answer

For most buyers the decision comes down to three questions. How should the fabric feel and fade? What retail price does the jean need to hit? And does the fabric include stretch, slub or other effects that depend on a particular spinning route? The sections below take these in turn, starting with what the two methods actually do to cotton fibre.

If you are still building the wider picture of a denim range, the guide to building a denim range from one fabric shows where yarn sits among the other choices, and the denim sourcing guide covers mills and suppliers.

How denim yarn is made: ring frame vs rotor

Cotton arrives at a spinning mill as bales of short fibres. Those fibres are cleaned, carded into a loose rope called sliver, and then turned into yarn by one of several routes. Two of them dominate denim.

Ring spinning draws the sliver out into a thin, loose strand called roving, then thins it further and twists it onto a bobbin in a continuous process. The fibres are drawn straight and aligned along the length of the yarn before they are twisted, which gives a compact, relatively strong yarn that can be made fine. It is a slower process with more handling steps, which is why it costs more.

Open-end spinning, also called rotor spinning, skips the roving stage. The sliver is opened into individual fibres, which are fed into a fast-spinning rotor. The fibres collect on the rotor wall and are twisted into yarn as it is drawn off. The process is faster and more automated, and the yarn is typically bulkier and more even, with a rougher, more open surface. Because some fibres wrap around the core of the yarn rather than lying parallel in it, open-end yarn is usually weaker than a ring-spun yarn of the same count.

Neither process is a fault or a shortcut. Open end cotton spinning is an established, efficient way to produce coarse yarn, and a large share of everyday denim uses it in at least one direction of the fabric. The point for a buyer is knowing which one you are paying for and whether it matches the product story.

Denim yarn count explained

Yarn count describes how thick a yarn is. In denim it is most often quoted as Ne, the English cotton count, where a higher number means a finer yarn. A 7s yarn is thick and rope-like; a 20s yarn is much finer. A fabric spec usually gives a warp count and a weft count, for example “warp 10s, weft 10s”, and may add the spinning method for each.

Denim yarn count matters because it works with weight and construction, so yarn count denim specifications should always sit beside the weight line. Heavier fabrics tend to use coarser warp yarns, and lighter fabrics use finer ones, though the same weight can be built from different counts and densities. Coarse yarns give a chunky, textured surface with strong visible character. Finer yarns give a smoother, cleaner face and a drapier fabric. Read the denim fabric weight guide alongside this section: weight and yarn count should be specified together, not separately.

A related point is that a fabric made with the same count in warp and weft behaves differently from one with a coarser warp and a finer weft. Ask the mill to state both counts rather than quoting one. The mismatch between them is part of what gives the weave its visible diagonal and affects how the fabric moves, which is covered in the denim weave types guide.

What each yarn does to denim hand feel

Ring spun denim and its open-end counterpart can feel quite different in the hand. Denim hand feel is the way a fabric feels when touched, folded and worn. Yarn influences it in several ways.

• Surface. Ring-spun yarn tends to have a smoother, more compact surface. Open-end yarn tends to be slightly rougher and fuller. After washing, the difference can narrow or widen depending on the finish.
• Body and bulk. Open-end yarn is more voluminous for its weight, which can give a fuller, sometimes drier hand. Ring-spun yarn can feel denser and more refined.
• Consistency. Open-end yarn is typically more uniform in thickness, so the fabric face looks even. Ring-spun yarn, especially with slub, can vary on purpose.
• Softness over time. Softness depends heavily on washing and finishing, so judge a washed sample rather than the greige fabric. See the guide to denim washes.

The safest way to compare is physical: ask for two swatches of the same weight and weave, one in each yarn route, in the same finish. Hold them side by side and fold them. A written description cannot replace that.

Slub denim: planned irregularity

Slub denim is made with yarn that deliberately varies in thickness along its length, creating small thick-and-thin patches. These show as irregular horizontal or vertical texture on the fabric surface and give a more vintage, uneven fade. Slub is a design effect, not a defect, but it must be specified, because random irregularity in a plain yarn is a quality fault.

Slub yarn is typically produced on ring frames with a slub-making attachment, although effects can also be created in other ways. When you ask for slub, define the intensity: subtle, medium or strong. Provide a reference swatch, and agree how much variation between rolls is acceptable. Otherwise one lot of fabric may look noticeably rougher than another.

Strength, durability and the real-world trade-offs

Because ring-spun yarn is usually stronger for its count, it is often chosen where tear and tensile performance matter or where the fabric is light and the yarn is fine. Open-end yarn can still make durable jeans, particularly in heavier weights where the yarn is coarse and the fabric is dense. The pressure points are in lighter, finer fabrics and in stretch fabrics, where weaker yarn can contribute to seam slippage or early wear at stress areas such as the pockets and crotch.

Rather than rely on a rule, ask the mill for the tear and tensile results for the fabric you are considering, and check the stated test methods. The garment testing guide explains which tests to request, and the denim shrinkage guide covers dimensional stability, which is also affected by yarn and construction.

Mixed constructions: where the savings often hide

Fabrics do not have to be ring-spun or open-end throughout. Many constructions combine them, for example a ring-spun warp with an open-end weft, or ring-spun slub in the warp and plain yarn in the weft. The warp is what you see most on the face of a 3x1 twill, so warp quality often drives the look, while the weft contributes more to handle and stretch recovery.

That makes mixed yarn a legitimate cost lever. A brand wanting a premium face at a more controlled price may accept a plainer weft yarn. A brand wanting a vintage look may spend on the warp slub and save elsewhere. The risk is not the combination itself, but not knowing about it. Make sure the spec states the route for each direction so every quote is comparing the same thing.

Stretch fabrics add another layer. Most stretch denim uses core-spun yarn, where elastane is wrapped in cotton, and that is typically made on ring frames. Read the stretch vs rigid denim guide and the denim fabric composition guide for how blends affect fit and recovery.

What the yarn choice does to cost: a worked example

Yarn is only one part of fabric price, but it flows through to the jean. The numbers below are purely illustrative, to show the arithmetic you should repeat with real quotes.

On a 500-pair order, the example difference is modest in absolute terms, and may be well worth paying if it changes how the jean feels and ages. On a very large order it adds up quickly, which is why high-volume programmes often take the cost-led route. The question to ask is not “which is cheaper?” but “what does the customer notice for this extra spend?”. Use the jeans costing sheet to see where fabric sits in the landed cost, and the cost to manufacture jeans guide for the full breakdown.

Which yarn for which product

• Entry-price everyday jeans: open-end warp and weft, or open-end weft with a ring-spun warp, if cost is the main driver and the fabric is mid to heavy.
• Premium or vintage-look jeans: ring-spun warp, often with slub, to give depth of fade and a less uniform face.
• Stretch fits and skinny styles: ring-spun core-spun yarn, which supports stretch and recovery.
• Lightweight denim for shirts and dresses: finer ring-spun yarns for drape and a smooth surface.
• Selvedge: usually ring-spun and often coarser, with the loom type being the defining feature. See what is selvedge denim.
• Raw denim: yarn character shows strongly in unwashed fabric. See raw vs washed denim.

How to specify denim yarn so quotes are comparable

Place this alongside weight, width, weave and finish. The jeans tech pack and denim specification guide shows where each line belongs. Vague phrases such as “premium denim” or “heavy cotton” leave the yarn to the supplier, and the supplier will choose the one that meets the price.

Common yarn mistakes buyers make

• Comparing quotes with different yarn. Two prices that look similar may be built on different spinning routes.
• Assuming ring-spun always wins. A heavy, coarse open-end fabric can be an excellent, durable choice for the right customer.
• Ignoring weft. The warp gets the attention, but weft yarn affects handle, stretch and shrinkage.
• Approving on greige fabric. Hand feel changes after washing, so approve washed samples.
• Specifying slub vaguely. Without a reference swatch, you may receive a different effect in bulk.
• Skipping lot consistency. Yarn variation between production lots can show up as shade or texture differences. See denim colour fastness and the jeans inspection checklist.

Choosing denim yarn with Ruhrose

Ruhrose develops and manufactures denim in Bangladesh with UK buyer support, so yarn decisions can be discussed with the people who sit between you and the mill. We can propose fabric options at different yarn routes, supply swatches and put the yarn line into a clear specification before sampling begins. Our 500 pieces per style and colour structure means you can test a ring-spun or slub fabric on a controlled first run before committing to larger volumes.

If you are comparing ring spun vs open end denim for a specific style, share your target retail price, the look you want and your preferred fit. Start a product enquiry and we will suggest suitable options. For next steps, the guides to launching private label jeans and finding denim fabric suppliers are useful companions.

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