When you slip on a pair of tabi socks, you're putting on something that has travelled through fields, factories, and centuries of textile history before it reaches your feet. The fibres in our socks aren't chosen by accident. Each one earns its place because of what it brings to the fit, the feel, and the longevity of the pair. It can be easy to assume that 100% cotton is best and in many cases, even for me, I still try to look for that 100% cotton sock and it's an option that I still want to provide, understanding that everyone has their preferences (or maybe just indifferent!) But I've learned that it's important to also be open and mindful to why other materials are used and to be accepting of that too.
This guide walks through the seven materials (so far) that appear across our range — cotton, polyester, polyurethane, acrylic, nylon, wool, and rayon — explaining where each one comes from, how it's made, and why we use it.
Our aim is simple: when you read the composition label on a pair of our socks, you should know exactly what each percentage means and why it's there.
Cotton
Cotton is a natural fibre that grows in fluffy white bolls around the seeds of the cotton plant (Gossypium). It's one of the oldest cultivated fibres in the world, with archaeological evidence of cotton use stretching back more than 7,000 years to the Indus Valley and ancient Peru.
Today, the bulk of the world's cotton is grown in India, China, the United States, Brazil, and Pakistan, where the warm climate and long growing seasons suit the plant. Once the bolls open and ripen, the cotton is harvested and put through a process called ginning, which separates the soft fibres from the seeds. Those fibres are then cleaned, combed, and spun into the yarn that eventually becomes a sock.
In a sock, cotton does several things very well. It's breathable, allowing air to move freely around the foot. It's highly absorbent, drawing in moisture from the skin and reducing the clammy feeling that can build up over a long day. It's soft against the skin, hypoallergenic for most wearers, and easy to wash. For everyday tabi socks, cotton forms the comfortable, skin-friendly bulk of the fabric, particularly around the toe split where you want a soft, forgiving feel.
Over half of our graphic printed socks contain 80% cotton, here is a selection:
- Classic ribbed crew length Tabi socks
- Botanical earth-toned print socks
- Asymmetric bright pop pink and blue Tabi socks
- Blue maths numbers cotton Tabi socks
Polyester
Polyester is a synthetic fibre made from polyethylene terephthalate (PET), the same family of polymers used in clear plastic bottles. It was developed in the 1940s by British chemists at the Calico Printers' Association and commercialised shortly afterwards, going on to become one of the most widely used textile fibres in the world.
The fibre is produced by reacting petrochemical-derived ingredients to form long polymer chains, which are then melted and extruded through fine nozzles called spinnerets to create continuous filaments. These filaments are stretched, set, and cut into staple fibres or kept as filament yarn. The bulk of the world's polyester is manufactured in China, India, and other parts of Asia. Recycled polyester (often labelled rPET), made from post-consumer plastic bottles, is increasingly available and uses significantly less energy and water than virgin polyester.
In socks, polyester pulls its weight in three main ways. It wicks moisture away from the skin to the surface of the fabric, where it can evaporate. It dries quickly, holds its shape after washing, and resists wrinkling and shrinking. It also adds durability, helping a sock survive far more wash cycles than pure cotton would manage on its own. Blended with natural fibres, polyester gives a sock structure and longevity without sacrificing comfort.
Polyurethane
Polyurethane is a versatile synthetic polymer first developed in 1937 by Otto Bayer and his team in Germany. In the textile world, it usually appears as elastane (also known as spandex or by the brand name Lycra), a fibre that can stretch up to seven times its original length and snap back without losing shape.
Elastane is produced by reacting polyurethane with other compounds to form long, elastic polymer chains, which are then spun into ultra-fine threads. These threads are almost always blended with other fibres rather than used on their own, so even a small percentage by weight has a big effect on how a fabric behaves. The major producers are based in China, South Korea, and Japan, with several global brands operating speciality elastane mills.
In a sock, polyurethane is the reason the cuff stays up around your ankle, the reason the heel pocket cups your foot rather than sagging, and the reason a tabi sock keeps a clean, snug profile around the toe split. Even a small amount — typically between 1% and 5% — gives the sock its stretch, its recovery after washing, and its ability to hug the foot without binding. Without it, a sock would feel loose, baggy, and short-lived.
Most of our socks have a small amount of Polyurethane which you can see in the description.
Some of the socks that we have:
Acrylic
Acrylic is a synthetic fibre made from a polymer called polyacrylonitrile, which is derived from petrochemicals. It was developed by DuPont in the 1940s and brought to market under the name Orlon in 1950, intended as a cheaper, easier-care alternative to wool.
Production starts with acrylonitrile, which is polymerised into long chains and then dissolved in solvent before being extruded into fibres. The fibres are stretched, crimped, and cut to give them a soft, woolly texture. Most acrylic today is manufactured in China, Turkey, India, and Mexico, where large-scale petrochemical and textile industries sit side by side.
For socks, acrylic earns its place where warmth and softness matter most — particularly in thicker winter and lounge styles. It's lightweight, holds dye exceptionally well (so colours stay bright wash after wash), resists moths and mildew where wool would not, and is much easier to care for than wool. It also costs less than natural alternatives, which means a warm, cosy sock can be made at an accessible price. In our range, acrylic appears most often in the cushioned, cold-weather tabi styles where you want the feel of wool without the upkeep.
Some of our socks which contain acrylic:
- Soft blue blossom spring Tabi socks
- Aubergine eggplant print Tabi socks
- Angora blend floral warm Tabi socks
Nylon
Nylon was the world's first fully synthetic fibre, invented by chemist Wallace Carothers at DuPont in 1935 and launched commercially in women's stockings in 1940. Its arrival fundamentally changed the textile industry and ushered in the age of synthetics.
Chemically, nylon is a polyamide produced through a reaction between two petroleum-derived compounds, which form long polymer chains. These chains are melted, extruded into filaments, and drawn into yarn. The major producers today include the United States, China, and several European countries, with both virgin and recycled nylon (often made from reclaimed fishing nets and industrial waste) widely available.
In socks, nylon is the workhorse fibre for durability. It has exceptional abrasion resistance, meaning it stands up to the constant friction between foot, sock, and shoe far better than cotton or wool alone. It's also smooth, lightweight, and slightly elastic, which helps a sock keep its shape and resist pilling. You'll typically find it concentrated in the heel and toe areas, where wear is heaviest, or blended throughout to extend the life of the whole sock. For tabi designs, where the seam around the split toe is a natural stress point, nylon adds the strength needed to keep that seam intact for the long haul.
Some of our Tabi socks which contain Nylon:
- Traditional Japanese flip-flop and blossom Tabi socks
- Koi Fish print crew Tabi socks
- Sushi print crew Tabi socks
- Geometric Hemp Leaf pattern Tabi socks
Wool
Wool is a natural protein fibre that grows on sheep, and depending on the breed it can be soft and fine (as with merino) or coarser and harder-wearing. Humans have spun and woven wool for around 10,000 years, making it one of the oldest textiles in continuous use.
The world's largest wool producers are Australia, China, and New Zealand, with smaller flocks across the United Kingdom, South America, and South Africa contributing distinctive regional fibres. Sheep are sheared once or twice a year — a process that doesn't harm the animal — and the raw fleece is then washed (or "scoured") to remove lanolin and dirt, carded to align the fibres, and spun into yarn. Look for accreditations such as the Responsible Wool Standard (RWS) if animal welfare and land management are important to you.
Wool's value in a sock is hard to overstate. It regulates temperature in both directions, keeping the foot warm in winter and surprisingly cool in summer. It can absorb up to around 30% of its own weight in moisture before feeling damp, which means it manages sweat far better than most fibres. It's naturally antibacterial, which helps reduce odour, and its natural crimp gives it cushioning and resilience. Merino in particular is fine enough not to itch, making it ideal for socks worn against bare skin.
Some of our tabi socks which contain wool:
Rayon
Rayon is a semi-synthetic fibre — natural in origin but heavily processed — made from regenerated cellulose, usually sourced from wood pulp (often beech, eucalyptus, or bamboo). It was first developed in the late 19th century as an affordable alternative to silk and is sometimes labelled as viscose, modal, or lyocell, depending on the exact production method.
The basic process involves dissolving wood pulp in a chemical solution to break it down into a thick liquid, then forcing that liquid through spinnerets into a bath that solidifies it back into long, fine fibres. Modern variants like lyocell (often sold under the brand name Tencel) use a closed-loop solvent system that recycles nearly all the chemicals used, making it one of the more environmentally considered fibres available. Most rayon today is produced in China, India, and Indonesia, with speciality lyocell mills operating in Austria and elsewhere.
In socks, rayon brings a particular kind of comfort that's hard to replicate. It's exceptionally soft — often compared to silk — and drapes against the skin without bunching or stiffening. It's highly breathable and absorbent, helping to keep feet cool in warmer months. It also takes dye beautifully, which is why rayon-blend socks often have a richer, more lustrous colour than fully synthetic alternatives. We use it where a smooth, luxurious hand-feel is the priority, particularly in lighter-weight tabi styles intended for warmer wear.
Some of our tabi socks which contain Rayon:
Why blends, not single fibres
You'll notice that very few of our socks are made from just one of these materials. That's deliberate. Each fibre has strengths and weaknesses, and the right blend lets us combine the best of several.
A typical pair might combine cotton for softness and breathability, polyester for moisture management and durability, nylon for abrasion resistance at the heel and toe, and a small percentage of polyurethane for stretch and recovery. A winter pair might lean on wool or acrylic for warmth, balanced by nylon for strength and a touch of elastane for fit. The exact recipe depends on what the sock is meant to do — and that's the part we're committed to being open about.
If you ever want to know exactly what's in a particular pair of our tabi socks, the composition is listed on every product page. And if you'd like more detail on any of these materials, or on a specific pair you're thinking about, feel free to contact us!