If you have been buying your leggings for running or the gym, the first ten minutes of a pilates class will surprise you. A reformer loads the fabric at different points, so a different garment works. Five things worth checking.
1. The inner-thigh seam
This matters most and gets discussed least. Lying or kneeling on a reformer carriage, the inner thigh is in constant contact with the upholstery. A raised, double-stitched seam there will chafe within twenty minutes — and the seam itself will fail sooner.
Look for: a flat, flatlock seam, or better still, no seam at all in that spot. Run your hand over it: if the seam stands proud of the fabric, it is not made for pilates.
2. Waistband height and layers
In a spinal roll or a sit-up the belly compresses, and the waistband either holds or rolls. One that rolls has to be pulled back up ten times an hour.
Look for: a band at least 10–12 cm high that is double-layered and sits below the rib cage. Height alone is not enough — a single-layer band will curl regardless.
A common mistake: sizing down because “it will hold better”. It works the other way round: a tight band rides up onto the rib and rolls there.
3. The squat test, in a light colour
Sheerness is not about the colour but about fabric weight and knit density. A 180 gsm light grey legging goes sheer in a squat; a 250 gsm one in the same colour does not.
Look for: fabric above 240 gsm if you are buying a light colour. In a shop, squat in the fitting room and check the mirror; at home, fold forward against a light wall.
4. Inseam for your own height
A “7/8” cut reaches the ankle on a 165 cm frame and stops at half-mast on a 175 cm one. That is not a flaw, just grading — but it is worth knowing what you are buying.
Look for: the actual inseam in centimetres on the product page, per size. If it is not listed, ask. We publish the M inseam, with roughly 2 cm of difference per size from there.
5. What washing does to it
Stretch fabric is not worn out by wearing but by washing. Softener coats the elastane fibre, and from then on it will not recover — the most common reason a good legging goes baggy within three months.
What to do: 30 °C, inside out, no softener, and never a tumble dryer. That is it. Those four rules matter more than which brand you buy.
In short
If you check only one thing before buying, make it the inner-thigh seam — it is the hardest to fix and the fastest to ruin a class. The waistband and sheerness come next; inseam is a comfort question after that.
