The most common shapewear mistake starts with a simple wrong assumption: that firmer is always better. It is not. Jackie London compression levels are not a scale from worse to best, they are four different tools built for four different jobs. Once you understand what Medium, Sculpting, High, and Max each do, you stop guessing and start choosing by what you actually want.
Get the level right and the garment does its job comfortably. Get it wrong and even a well-made piece feels like a punishment by mid-afternoon.
What Compression Level Actually Means
Compression level describes how much the fabric presses against your body and how much structure the garment adds, which comes from the fabric, construction, and closures used, not from the size you buy. A Max piece and a Medium piece in the same size will feel completely different, and both are correct for their purpose. The level tells you how the garment will feel and how much shaping it delivers. Comfort over a full day comes down to wearing your true size, whichever level you choose.
This matters because the same size in a different compression level is not a sizing error, it is a design choice. Understanding that keeps you from sizing up or down when the real variable was the compression level all along. It also connects directly to comfort over time, which we cover in our guide to everyday wear.
The Four Jackie London Compression Levels
Jackie London shapewear is built across four compression levels, each defined by its own construction, not just how tight it feels. Here's how they break down.
| Level | Feel | Built for |
|---|---|---|
| Medium Compression | ⬛⬛◻◻◻ | Soft, seamless fabric construction with gentle, versatile shaping |
| Sculpting Compression | ⬛⬛⬛◻◻ | Strong shaping and contouring, in a slip-on powernet style with no hooks or zippers |
| High Compression | ⬛⬛⬛⬛◻ | Strong shaping and compression with structured support, in powernet with hook and/or zip closures |
| Max Compression | ⬛⬛⬛⬛⬛ | Maximum shaping and structure, in powernet built with boning |
Medium Compression
Medium compression is our soft, seamless tier. These pieces use soft, seamless fabric construction, built for gentle sculpting you can wear from morning to night without thinking about it.
Sculpting Compression
Sculpting compression steps up the shaping with a powernet construction, in a slip-on style with no hooks, zippers, or closures to manage. It's a strong middle ground: more contouring than Medium, without the closures of High or Max.
High Compression
High compression adds structure on top of shaping. These are powernet pieces finished with hook and/or zip closures, which let the garment hold a firmer, more structured fit than a slip-on style.
Max Compression
Max compression is our most structured tier, built with boning inside a powernet construction for maximum shaping. This is the level built for the most defined, structured support Jackie London offers.
How to Choose the Level That's Right for You
The right level comes down to how much shaping and structure you personally want, not a rule about how many hours you're allowed to wear it. All four levels are built to be worn comfortably in your true size, whether that's for a full day at work or a night out.
Want soft, seamless fabric with gentle, versatile shaping? Medium is built for that.
Want stronger contouring in an easy slip-on piece? Sculpting adds that step up.
Want the structured hold of a hook or zip closure? High delivers that fit.
Want maximum shaping with boned structure? Max is our most structured option.
Plenty of people wear Sculpting, High, or Max as their everyday go-to, not just Medium, because comfort at any level comes down to choosing your true size, not the compression level itself. A quick way to check a piece's level while you shop: read the construction details on the product page. Soft, seamless fabric points to Medium. A slip-on powernet piece with no closures is Sculpting. Hook or zip closures on powernet mean High. Boning means Max. A light, seamless option like the seamless shaping tank top is a good example of what Medium compression looks like on a product page.
The Link Between Compression and Size
Compression level and size interact, which is where a lot of discomfort comes from. A High or Max piece in the wrong size presses too hard and rolls, while the same level in your correct size supports comfortably. Reaching for a smaller size to get more shaping backfires, because more compression should come from choosing a higher level, not from squeezing into a smaller piece.
So decide your compression level and your size separately. Choose the level for the shaping and structure you want, then buy your true size within that level. Our size guide covers measuring correctly, and our piece on why shapewear rolls down explains how sizing down for compression causes the rolling most people blame on the garment.
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