When to Replace Underwear, T-Shirts and Socks

Advice on this usually arrives as a schedule: replace underwear every year, t-shirts every two. A schedule ignores how often you actually wear a given piece, how you wash it, and how it was made in the first place. A garment worn twice a month and air dried will outlast one worn weekly and tumbled, by a wide margin.

Physical signs are more honest than dates.

Sign one: the waistband stops recovering

This is the definitive test for underwear. Stretch the waistband about a hand's width and let go.

A band in good condition snaps back immediately and completely. A finished one returns slowly, or returns most of the way and stops. Once it fails this test the garment cannot be saved — the elastic has lost its recovery and no wash will restore it.

Everything else about the pair may still look fine. It is still finished, because a waistband that does not hold is why underwear rides and rolls all day.

Sign two: the collar no longer sits flat

For t-shirts, the neckline is where wear shows first and most visibly.

Lay the shirt flat and look at the collar from the side. New ribbing lies flat against the body of the shirt. Worn ribbing ripples, or stands slightly away from the fabric, or shows a wavy edge.

A shirt with a rippled collar reads as tired from across a room even if the body is spotless. This is the moment to demote it to a layering or sports shirt rather than throw it away — its useful life continues, just not in public.

Sign three: the fabric has gone thin

Hold the garment up to a window. Cotton thins gradually through abrasion, and the first places to go are the ones under the most friction: the seat of underwear, the shoulders and hem of a t-shirt, the heel and ball of a sock.

If light comes through noticeably more in one area than the rest, the fabric is near the end. Thin fabric also fails suddenly rather than gradually, which is worth knowing before a long day.

Socks deserve their own rule

Socks fail at the heel and the toe, and they fail asymmetrically — one of a pair almost always goes first. Two habits help:

• Buy in a single colour and style. Then a survivor is never orphaned; it pairs with any other survivor.
• Replace in batches, not individually. Mixed-age socks in one drawer means constantly matching a stretched one with a new one, which feels wrong underfoot.

The habit that extends everything

Rotate. If you own ten pairs of underwear and wear them in a fixed order, each pair is worn and washed the same number of times, and the whole set ages evenly and slowly.

If you always reach for the top of the pile, three pairs absorb almost all the wear while seven stay nearly new. The set fails in a third of the time, and you end up replacing everything because the three you actually use are finished.

Putting laundered items at the bottom of the stack rather than the top is the entire technique. It costs nothing and it roughly triples the useful life of a drawer.

What to do with the ones you retire

Worn cotton is genuinely useful as cleaning cloth, and t-shirts with sound bodies but poor collars still work under a jumper. Textile recycling accepts what is beyond either.

What matters is retiring them from the rotation once they fail a test, rather than keeping them in circulation and being mildly annoyed every third day.