Clothes worn at home get the least thought and the most wear. A pair of lounge trousers can be on your body five evenings a week, washed constantly and expected to cost almost nothing. That is a demanding brief, and it is why so much loungewear falls apart quickly. The category rewards attention to fabric far more than it rewards attention to design.
What loungewear has to do
It has to be comfortable while sitting for hours, tolerate being slept in occasionally, survive frequent washing and still look presentable enough to answer the door. That is a different job from either daywear or nightwear. Buying pyjamas and expecting them to cover it is the usual mistake.
Fabric decides everything
Cotton jersey breathes and softens with washing, but stretches out at the knee and shrinks in length. Cotton blends with a little elastane hold shape better and pill more. Brushed fleece is warm and flattens in the dryer. Modal and viscose are cool and drape well, but they are weaker when wet, so gentle washing matters. Check the composition alongside the measurement tables, which for the sizes listed at https://just-my-size.com/ are given per garment rather than as one generic chart.
Waistbands and the sofa test
A drawstring waist is adjustable and does not dig in when you sit for a long evening. A thin flat elastic will roll and never unroll. Wide, soft, non-roll elastic with an internal drawcord is the combination that lasts, and it is worth looking for specifically.
Sleepwear is a separate purchase
What is comfortable on a sofa is not necessarily comfortable in bed. Seams that were unnoticed sitting up become obvious lying down, and anything with a fitted band across the ribs will interrupt sleep. Loose, smooth, breathable and light is the whole specification.
- Wide waistband with a drawcord rather than narrow elastic.
- Flat seams, especially anywhere you lie on them.
- Breathable fibres for anything worn overnight.
- Length checked against the inseam, not guessed from the photograph.
- A soft wire-free bra if you prefer support at home, rather than an everyday bra worn all evening.
Where the cheap version is fine
Plain cotton lounge trousers and simple jersey tops are one of the few categories where the inexpensive option genuinely competes, because there is no complicated construction to get wrong. What you gain by spending more is usually denser fabric and better seams, both of which show after about a year. Matching sets carry a price premium for the coordination and nothing else.
Where it is worth spending
Anything with elastane, anything brushed, and anything you sleep in every night will justify a better fabric. Density is the thing to pay for. A heavier jersey resists bagging at the knee and stays opaque considerably longer.
Care and honest lifespan
Cool wash, inside out, no dryer for anything with stretch in it, and expect visible pilling on soft brushed fabrics within months regardless of price. A comb or fabric shaver removes it and buys another season. Two years of heavy use is a reasonable expectation, and anything still going after that has been lucky.