Choosing bath towels by weight, fibre and weave

What GSM tells you

Towel labels often give a weight in grams per square metre, shortened to GSM. It describes density, not size: a hand towel and a large bath sheet cut from the same cloth have the same GSM.

Exact bands vary between makers, but as a rough, typical guide:

• Lighter towels, below about 400 GSM, feel thin and flat and dry quickly on a rail. They suit hot weather, the gym bag and a guest room where towels are washed often.
• Mid-weight towels, roughly 400 to 600 GSM, balance softness and drying time and suit most family bathrooms.
• Heavy towels, above about 600 GSM, have deep, close loops and feel substantial. They take up a lot of water and need good airflow, or a dryer, to avoid smelling damp between uses.

Higher is not automatically better. A very heavy towel in a small, poorly ventilated bathroom can stay damp all day, while a mid-weight one dries in time for the next shower.

Fibre and staple length

What the yarn is made of decides how a towel feels when new, how it ages and how it behaves wet.

Cotton

Cotton remains the usual towel fibre because it takes up water readily and stands up to frequent washing. Quality depends heavily on staple length, the length of the individual fibres picked from the cotton boll.

Short fibres leave many loose ends along the yarn. Those ends can feel harsh after many washes and tend to shed as lint. Long and extra-long staple cottons spin into smoother, stronger yarn with fewer protruding ends, so towels made from them feel softer and wear more evenly. Egyptian and Pima are two well-known long-staple types; the names describe the cotton, though, not the towel, so the weave and finish still matter.

Bamboo blends

Towels sold as bamboo are usually made from viscose or lyocell regenerated from bamboo pulp, often blended with cotton. These fibres are smooth and drape fluidly, with a cool, silky handle. They take up water quickly, which some people find gentle on the skin.

Pure regenerated fibres can be slower to dry than cotton of the same weight and are weaker when wet, which is one reason they are so often blended with cotton for strength.

Weave and construction

The way threads are arranged on the loom changes how a towel meets water and air.

Terry loops

Terry cloth uses an extra set of warp yarns that stand up as loops on both faces of the fabric. Those loops hugely increase the surface that touches the skin and holds water.

Loop height, density and twist all play a part. Tightly twisted yarns make firm, durable loops that feel slightly brisk and resist snagging. Low-twist and zero-twist yarns are spun so the fibres lie more loosely, giving loops that feel airy and soft from the first use. They tend to shed a little more lint in the first few washes.

Waffle weave

Waffle, or honeycomb, towels have no loops at all. The threads form a grid of raised ridges and small recessed squares. Dry, the fabric is flat and light; wet, the cells draw water in.

With no deep pile to hold moisture, air moves through waffle fabric easily and it dries quickly. Waffle towels fold small and suit travel, narrow shelves and bathrooms without much space to dry things.

First wash and everyday care

How a towel is treated from the beginning shapes how long it stays absorbent.

Before first use

New towels usually carry sizing or softening finishes from production. They help the towel look good on the shelf but get in the way of absorbency. Wash new towels before using them, at the temperature on the care label, with a modest amount of detergent. Wash strong colours separately for the first few times, as loose dye and lint can transfer.

Between uses

A towel left folded on a hook or bunched over a door stays damp in the middle, and damp cotton soon smells sour. Spread it out on a rail so air reaches both sides, and give heavy towels the warmest, best ventilated spot in the bathroom. In a small room without a window, an extractor fan or an open door after a shower makes a real difference. Rotating two or three towels per person gives each one time to dry right through before it is used again.

When towels stop absorbing

Towels that start pushing water around instead of soaking it up have usually built up residue rather than worn out. Fabric softener and dryer sheets coat the loops with a slippery film, and too much detergent leaves soap trapped deep in the pile. In hard water areas, minerals add to the stiffness.

A reset often helps. Run a wash with no detergent or softener at all, or with a small amount of white vinegar in place of detergent, then a normal wash with a reduced dose. Check the care label first, and do not mix vinegar with bleach. From then on, measure detergent carefully and leave softener out. Shaking towels before hanging them, or tumble drying on a low setting where the label allows, helps lift the loops again.

Frequently asked questions

What does GSM mean on a towel?

Grams per square metre, a measure of how dense the fabric is. Lower figures mean lighter towels that dry quickly; higher figures mean thicker, plusher towels that hold more water and take longer to dry.

Why do new towels sometimes push water around?

New towels often carry finishes from manufacturing that keep them smooth in the packet. A wash or two before first use removes them and lets the cotton absorb properly.

How does fabric softener affect towels?

Softener leaves a film on the loops that makes them feel slippery and gradually reduces absorbency. Towels generally work better without it.

Is a waffle towel better than terry?

They suit different needs. Waffle towels are light, flat and dry quickly, which makes them good for travel and small bathrooms. Terry loops feel plusher and soak up water faster against the skin.