Which Absorbency Do I Need? Light to Super Heavy Explained

What do period pants absorbency levels mean?

Light, Medium, Heavy and Super Heavy describe how much fluid the absorbent layers can hold before they’re full, and most brands express that in tampons’ worth. The label is about capacity, not time. A Heavy pair doesn’t last a set number of hours; it holds a set amount, and how fast you fill it depends on your flow that day.

Annahitah uses those four names. Its Super Heavy styles hold six to eight tampons’ worth. Its Heavy and Medium styles are described as saving three to five tampons per wear. Its Light styles give no figure and are made for the lightest days, discharge, sweat and backup.

Inside the pant, the layer order is the same at every level: a wicking top layer over absorbent, breathable middle layers. What changes is the absorbent core. Brand A, for one, lists a thicker lining at each step up, and overnight styles across brands run longer at the front and back. This article is about which level to choose, not how the layers do their work.

How many tampons’ worth does each level hold?

Across brands, light pants hold roughly one to three tampons’ worth and the top levels six to eleven, so the names only mean something next to the brand’s own numbers.

Brand A bases its sums on a 5 ml tampon, and Brand D’s blood-loss guide puts a soaked regular tampon or pad at about 5 ml too, so the ml and tampon columns line up. Annahitah publishes no ml figures, which is why its row only shows tampons.

Treat all of these as lab capacity numbers. Which? tests pants by timing how a 5 ml drop is absorbed and by measuring gusset saturation, and that’s a fair description of what a capacity figure is: fluid poured into fabric under controlled conditions. On your body, flow speed, how you sit or lie and where the blood lands all change how much of that capacity you can use before it reaches an edge.

How do you work out your own flow?

Count your tampon or pad changes on your heaviest day, and match that to the level above. You don’t need to measure anything.

That table follows Brand B’s method, and it works because tampon sizes are standardised in a way flow descriptions aren’t. “Heavy” means different things to different people; “a super tampon every three hours” doesn’t.

When in doubt, round up. Brand C’s advice is to start with the level for your heaviest day, because Medium and above also work on lighter days, while the reverse isn’t true.

What if your flow is light but you still leak?

Then look at fit before absorbency. A gusset that sits away from your body, or pants loose enough to shift when you move, let blood reach the edge of the absorbent zone before the layers have done their work. Brand E describes both failure modes: too big sags and leaks; too tight wicks moisture out through the seams. Check your hip and waist measurements against the chart before you buy a heavier level; we cover how to measure in our size guide.

What absorbency do you need on the first day?

Heavy or Super Heavy for most people, because the NHS says bleeding is heaviest in the first two days of a period. Brand B describes day one as spotting that builds and day two as the peak for many people, so plan for both days at your top level.

If your first day involves changing a pad or tampon every hour or two, Super Heavy is the one. Annahitah’s Super Heavy styles are Shanti, Odessa, Valentina and Athena, and the brand recommends Shanti and Odessa for postpartum bleeding and endometriosis, where flow can be heavy and unpredictable.

What about the last days?

Light or Medium is enough once the flow turns lighter and the colour shifts to pink or brown, which the NHS describes as the normal pattern towards the end of a period. A Super Heavy pair would cope, but you’d be wearing more gusset than you need.

That’s the practical case for owning two levels. Your heavy pairs do days one and two, your lighter pairs do the tail, and your heavy pairs are washed and dry again by the time the next period starts. Annahitah’s Medium styles are Aurora, Luna and Gaia; its Light styles are Venus, Nirvana and Eden, all three of them thongs.

Which absorbency works overnight?

Super Heavy, put on fresh at bedtime. Annahitah says its Super Heavy styles are designed for extended wear overnight, and its advice for a super heavy day is to wear one Super Heavy pair through the day and change into a second for the night. Brand A makes the same recommendation for its Super level, which has absorbency running from the front waistband to the back.

Coverage matters as much as capacity when you’re lying down, because blood travels backwards. Brand B notes that overnight styles are cut wider and longer for that reason, and Brand E says absorbency that reaches the rear waistband is what counts once you lie down.

When is a period too heavy for pants alone?

When you’re soaking through a pad, tampon or pair of pants every one to two hours, passing clots bigger than a 10p coin (about 2.5 cm), bleeding through to clothes or bedding, or bleeding for more than seven days. Those are the NHS’s signs of heavy menstrual bleeding, and the NHS suggests seeing your GP if heavy periods are affecting your life, come with severe pain, or involve bleeding between periods.

NICE guidance puts the objective threshold at more than 80 ml lost over a whole period, against an average of around 30 to 40 ml; the NHS’s own range for a normal period is about 20 to 90 ml, or one to five tablespoons. Nobody expects you to measure that. The change-frequency signs are what to watch.

On flooding days, Brand E suggests doubling up: Super Heavy pants as backup to a cup or tampon rather than the only line of defence. Annahitah’s advice for clots is to wipe the excess away with a tissue and flush it.

Do you need more than one absorbency level?

Yes, almost always, because a period isn’t one flow for five days. Two levels across three to five pairs cover most cycles: Heavy or Super Heavy for the first two days and nights, then Medium or Light for the rest.

A plan for a typical five-day period with one mid-cycle wash might look like this.

Swap the rows around for your own pattern, and if your heaviest days run to three, add a pair. Annahitah’s guidance is that three to five pairs cover a cycle with washing between wears.

Once you know your levels, the collections are grouped to match. The light flow pants are all thongs for the last days and backup. The medium flow pants suit the middle of a period or a lighter cycle. The heavy flow pants cover a regular heavy day, and the super heavy flow pants are for your first two days and nights.

Which absorbency should a first-timer or teen choose?

Medium or Heavy for a first pair, with Super Heavy added if periods turn out heavier. The NHS says first periods are often light and irregular to begin with, and Brand D’s teen guidance suggests Medium for a first period and Heavy for heavier days.

For a girl who hasn’t started yet, buying Heavy makes sense: it’ll cope with whatever the first few periods bring and still be useful later. Annahitah’s teen styles span Heavy (Serendipity, Lilah) and Super Heavy (Valentina, Shanti, Odessa, Athena), and Valentina, its signature teenage style, is the only one sold in XXXS.