How to choose yarn for socks

Socks are the one hand-knit that spends all day inside a shoe, taking every step with you. So "which yarn works for socks?" is not a matter of taste: it decides whether the pair survives one winter or five. Here is the short version, from the proven classic to the details of meterage and care.

Wool with polyamide: the workhorse blend

Most sock yarn in the world is 75% wool and 25% polyamide. That is the recipe behind classic Regia 4-ply: 75% wool, 25% polyamide, 210 m in a 50 g ball, 30-32 sts per 10 cm. The ratio is not an accident. Heels and toes rub against insoles and shoe leather through thousands of cycles, and pure wool gives way there first. Polyamide takes the abrasion, so the socks keep their shape and do not burst open under the toes.

A working range is 20 to 30% synthetic fibre. Less, and durability drops; more, and the yarn loses the warmth and moisture handling that make wool worth wearing. A good example of the full-strength blend is Pro Lana Sockenwolle uni 4 ply: the same 75% wool and 25% polyamide, 420 m per 100 g, in 22 solid colours.

A hundred percent wool: yes, with darning

Plain wool socks exist and they are wonderfully warm. They just play by different rules. Regia Premium Pure Color is 100% wool with 400 m per 100 g: soft, breathable, and faster to wear through at the heels than a blend. That is a normal arrangement rather than a defect. Pure wool socks are made to be darned now and then, and on them darning looks intentional, not desperate. For lounging and gifts, lovely; for daily wear in real shoes, take the blend.

Alpaca and other soft fibres

Alpaca is softer than sheep's wool, warmer, and less likely to irritate sensitive skin. In socks it belongs in blends with wool and nylon: pure alpaca has little elasticity and sags with wear. The result is an after-eight sock, meant for home and bed, less so for sneakers. The same goes for cashmere and mohair in sock blends: they are there for the feel, while polyamide still does the load-bearing.

The cotton alternative

If wool prickles or runs hot for you, cotton sock yarns are worth a look. Regia Cotton is 72% cotton, 18% polyamide and 10% polyester at 420 m per 100 g. Cotton absorbs moisture well and feels pleasant on the skin, but it has little bounce: without synthetic reinforcement cotton socks stretch out at the ankles. The blend above exists to solve exactly that.

Meterage, weight and gauge

The sock yarn standard is 4-ply (fingering): roughly 400-425 m per 100 g, 2-3 mm needles, 30-32 sts per 10 cm. That is the window where the fabric is dense enough not to wear through at once and thin enough to fit inside a shoe. Everything we stock in this weight is collected in Fingering / Sock / 4-ply.

As always, the swatch decides, not the label. Knit 10 x 10 cm with the actual needles and yarn, wash it, let it dry, and only then count stitches. Tighter starts to pinch; looser starts to wear.

Care and two small things

• Follow the band: blends usually allow a 40° delicate wash; pure wool prefers hand washing.
• Buy all balls from one dye lot. Two lots of one colour can differ by a visible stripe.
• A pair of size 42 socks from standard 4-ply takes about 100 g, 400-420 m: one full ball.

Start with the 75/25 classic and you will hardly go wrong. From there the choice unfolds on its own: all sock yarn in the catalogue, Regia and Pro Lana as reference points, and the odd experiment with pure wool or cotton when you want something special.