START WITH FIT, NOT FASHION
The one rule that matters: wear clothes that stay close to your body. Leggings, bike shorts or slim joggers with a cuffed ankle, plus a top that stays put when you move. There are three reasons, and none of them is about looking the part.
First, your instructor needs to see what your knees, hips and spine are doing. Reformer pilates is precise, and most of the value of a small class is someone spotting that your pelvis has wandered off. Baggy clothing hides exactly the things they are trying to correct. Second, loose fabric and moving equipment are a bad combination — a flapping hem can catch on a spring or a strap. Third, you will spend a surprising amount of the class with your legs higher than your head. A loose T-shirt obeys gravity, and you will spend the exercise holding it out of your face instead of concentrating.
You do not need a matching set, and you do not need anything new. If you own something stretchy that fits properly, you are dressed.
FABRIC: STRETCH FIRST, SWEAT SECOND
You will be lunging, folding, reaching overhead and lying flat, sometimes within the same minute. Fabric with proper stretch — most modern legging and training fabric — moves with you. High-waisted bottoms are worth it because they stay in place when you lie down and roll through your spine.
Reformer classes build heat steadily rather than leaving you drenched, so sweat-wicking fabric is a nice-to-have, not essential. Cotton works; it just holds the damp a bit longer. One less obvious point: very slick, shiny leggings can slide against the upholstered carriage, which is unhelpful when the carriage is already the thing that moves. A fabric with a little texture keeps you planted.
If you want to check your leggings are not see-through, a forward fold in front of a mirror at home will settle it before class does.
GRIP SOCKS: WHY THEY ARE REQUIRED
Grip socks are the one genuinely non-negotiable item, and there are two solid reasons for that. The first is safety. Your feet spend the class pressing on a footbar, hooked into straps or standing on a carriage that moves under spring tension. Bare feet get sweaty and slip; ordinary socks are worse — they turn a padded carriage into an ice rink. The rubberised sole of a grip sock anchors your feet so you can push and balance with control.
The second is hygiene. Reformer beds are shared equipment, used class after class through the day. The beds are cleaned between classes, but socks put a barrier between your feet and kit that other feet have used — which everyone quietly appreciates.
At our studio, grip socks are required for every class. If you forget yours, we sell pairs at the studio for £8, so a forgotten pair is a minor inconvenience rather than a wasted trip. Any brand is fine; the only requirement is grips on the sole.
WHAT TO LEAVE AT HOME
Rings, especially chunky ones. Your hands spend a lot of the class gripping a metal footbar or pressing into the carriage, and a ring digs into your palm quickly. Necklaces and bracelets swing into your face when you are on all fours and can catch on straps. Dangly earrings have the same problem. Small studs are fine; everything else is safer in your bag.
Check your clothes for hardware too. Zips, poppers, buckles and metal drawstring tips all end up between your body and the carriage at some point, which is uncomfortable for you and unkind to the upholstery. Hoodies with toggles, belts and anything with a stiff waistband are in the same category.
Trainers stay at the door — reformer pilates is done in grip socks, not shoes. And strong perfume is worth skipping; in a small studio, everyone shares the air.
HAIR, GLASSES AND OTHER PRACTICALITIES
You lie on your back for a good portion of the class, so a high bun becomes a hard lump under your head within minutes. A low ponytail or a plait is more comfortable and keeps hair away from the moving parts. Big claw clips are a gamble for the same reason — pretty until you lie on one.
Glasses are mostly fine; the exception is exercises with your legs overhead, where they can slide, so be ready to set them aside for a minute. If you wear shorts, note that some exercises put straps around your feet, ankles or calves, and leggings mean the straps sit against fabric rather than bare skin. Neither is wrong; leggings are just a touch more comfortable. Finally, bring a layer for before and after — studios are kept warm enough to work in, not to stand about in.
A NOTE FOR MEN
The same rules apply, just with fewer legging options in your wardrobe, probably. Fitted training shorts with a compression liner — or running shorts over compression shorts — work well, because loose football shorts fail the legs-above-head test immediately. A T-shirt that is trim rather than billowing, or tucked in, solves the rest. Grip socks come in larger sizes and plain colours, so no one is asking you to wear anything pastel.
Reformer pilates has a reputation as a women's class, but the equipment does not care, and neither does anyone in the room. Turn up in clothes that fit, and you will blend in by the second exercise.
QUICK ANSWERS
Broadly the same: fitted and stretchy works for both. The difference is that a mat has no springs, straps or moving carriage, so the rules about loose fabric and hardware relax. Grip socks matter less on a mat too, though many people wear them anyway for the traction.
Yes. The only nuisance is that a chunky watch sits between your wrist and the carriage during planks and hands-down work, which gets uncomfortable. Turning the face to the inside of your wrist, or taking it off for class, sorts it.
A water bottle, your grip socks and a spare hair tie cover it. A jumper or jacket for before and after is worth having, especially in winter. Everything you need for the class itself is already on the reformer.
Clothing-wise, only comfort: choose a waistband that sits where you want it and a top with room. Check with your midwife or GP before booking any class. We ask about pregnancy in our health declaration, and classes can be adapted — just make sure your instructor knows before you start.
No. If you own leggings or fitted shorts and a top that stays put, you are ready. The only purchase worth making is grip socks, and even that can wait, since studios that require them usually sell them at the desk.
RELATED READING
Your first reformer pilates class: what to expect — Dressed and booked? Here is what actually happens in your first class, step by step.
What is reformer pilates? A plain-English guide — Curious about the machine your socks will be gripping? The whole contraption, explained in plain English.