Period pants and pads are both worn externally, in your underwear, with no insertion required. The biggest difference is that period pants are reusable, while pads are disposable. Period pants also hold more fluid (10–60 ml, depending on the style), making them a comfortable option for longer wear and overnight protection.
This guide compares today's most popular period products—period pants, pads, tampons and menstrual cups. We'll look at comfort, cost, absorbency, environmental impact, ease of use and which product works best for different flows and lifestyles, so you can decide which option, or combination, is right for you.
Quick Answer: What's the Best Period Product for You?
- Choose period pants if: you want a reusable option with no insertion, reliable overnight protection, and everyday comfort
- Choose a menstrual cup if: you want the lowest long-term cost, have a medium to heavy flow, and don't mind a short learning curve
- Choose tampons if: you prefer an internal disposable product and aren't ready to try a menstrual cup
- Choose pads if: you're in the early days after giving birth, prefer disposable protection, or only need occasional period car
Still can't decide? Most people land on a menstrual cup with period pants as backup — it works for light to very heavy flow and removes almost all disposables from the routine.
The four product types at a glance
Before we go deep, here's the headline comparison.
|
Period pants |
Menstrual cup |
Tampons |
Pads |
|
|
Where it sits |
Outside (worn as underwear) |
Inside (vaginal canal) |
Inside (vaginal canal) |
Outside (in underwear) |
|
Capacity |
10–60 ml depending on style |
20–34 ml per cup |
5–18 g (~5–18 ml) per tampon |
5–15 g (~5–15 ml) per pad |
|
Wear time |
8–12 hours |
Up to 12 hours |
4–8 hours (TSS risk above 8) |
3–6 hours |
|
Reusable? |
Yes (3–5 years) |
Yes (up to 10 years) |
No |
No (some "reusable" cloth pads) |
|
Cost over 5 years |
~£70–£150 (5 pairs) |
~£20–£30 (1 cup) |
~£375–£625 |
~£375–£625 |
|
Best for |
Light–heavy days, sleep, teens |
Medium–heavy days, active people |
Active days, swimming |
Light days, post-partum, no-insertion preference |
*Tampon and pad absorbency is measured in grams (the industry testing standard); cup and pant capacity is measured in ml. The two are roughly interchangeable, since menstrual fluid is close to water in density.
Period pants vs pads: the direct comparison
Period pants beat pads on comfort, cost, and waste. Pads win on simplicity and are the better choice post-partum.
Both sit outside the body, so neither has a learning curve tied to insertion. The differences show up everywhere else. A pair of period pants holds 10–60 ml depending on style and lasts 8–12 hours of wear before needing a change — roughly double a pad's 3–6 hour window. Pants are reusable for 3–5 years, so the five-year cost of five pairs (If you buy a Ruby Cup bundle it would cost ~£70–£95) undercuts five years of disposable pads (~£375–£625) even before you factor in convenience. Pads also can't be adjusted to the same range of flow levels the way a pants wardrobe (light, medium, heavy-flow styles) can.
Pads still have three situations where they may be the better choice: the first six weeks post-partum, when internal products are off the table and heavy maternity pads remain the standard recommendation; as a backup for washing-machine emergencies or unexpected trips; and for anyone who simply doesn't want to wash a reusable product, full stop. If any of those describe you, pads aren't a downgrade, they're the right tool for that situation.
Period pants vs tampons
Tampons are the only option here that works for swimming. Everywhere else, period pants are more comfortable and far cheaper over time.
Tampons sit inside the vaginal canal and need to be changed every 4–8 hours — the FDA-recommended ceiling exists because of Toxic Shock Syndrome risk, which pads and pants don't carry. Period pants have no such time-pressure: 8–12 hours of wear, no insertion, no TSS risk. On light-flow days, tampons can be genuinely uncomfortable — dry cotton dragging against the vaginal wall — a problem pants don't have because they're not internal.
Cost tells a similar story to pads: tampons run £375–£625 over five years against £70–£95 for five pairs of pants (Ruby Cup bundle). The one place tampons keep an edge is water. Standard period pants aren't built for swimming — they'll fill up — so a tampon (or cup) is still the right call for pool days, with pants as your go-to on land.
Period pants vs menstrual cup
The cup is cheaper and more comfortable once you're past the learning curve. Pants have effectively no learning curve at all.
A menstrual cup holds 20–34 ml and can be worn up to 12 hours, lasting up to 10 years — the cheapest period product that exists, at roughly £20–£30 total over ten years. But it has the steepest learning curve of any product in this comparison; most people need usually two/three cycles to get comfortable with insertion and removal. Period pants ask nothing of you on day one and they look and feel like ordinary underwear.
In practice these two aren't really competitors; they're complements. The most common setup our long-term customers land on is one menstrual cup plus two/three pairs of period pants: the cup handles internal capacity, the pants act as backup or cover overnight and very heavy days, and together they remove almost all disposables from the routine. If you're choosing just one to start with, go with pants if you want zero learning curve, or the cup if lowest cost matters most and you're willing to spend a cycle or two getting comfortable with it.
Period products compared: Pros, cons and best uses
|
Period product |
Pros |
Cons |
Best for |
|
Period pants |
|
|
Beginners, overnight use, light to heavy flow, anyone who prefers external protection. |
|
Menstrual cup |
|
|
Heavy flow, active lifestyles, long workdays, eco-conscious users. |
|
Tampons |
|
|
Swimming, sports, occasional internal protection. |
|
Pads |
|
|
Postpartum recovery, occasional use, people who prefer disposables. |
Comfort and ease of use
Comfort is largely subjective, but the learning curve isn't.
Period pants
Almost zero learning curve. They look and feel like normal underwear (the modern ones; older versions were bulky). Most people are confident from day one.
Menstrual cup
The steepest curve of the four. The first three or four insertions can be fiddly. Most people get the hang of it within two cycles, and once you do, it's the most comfortable option here: You can't feel a correctly inserted cup.
Tampons
Easy to learn but never fully comfortable. Discomfort is common on light days because the dry cotton drags against the vaginal wall.
Pads
Easiest to learn, there's no insertion. Comfort varies a lot by brand and by what you wear with them. Most pad users describe a low-grade always-aware sensation that they stop noticing after a day or two.
Cost over five years
If cost is the main driver, the order is unambiguous: cup, then pants, then disposables. The breakdown:
-
A single Ruby Cup at £25.95 lasts up to 10 years. Five-year cost: under £25.
-
Bundle of five pairs of Ruby Cup pants (£70-£95) , replaced every five years: under £20/year.
-
Disposables average £6–£10 per cycle = £75–£125/year = £375–£625 over five years.
Environmental footprint
The Women's Environmental Network estimates that the average menstruator uses around 11,000 disposable period products in their lifetime. That's roughly 200 kg of waste, much of which contains plastic and takes hundreds of years to degrade.
Reusables eliminate almost all of that. A single cup replaces around 2,400 tampons or pads over its lifetime. A pair of period pants worn weekly for four years replaces around 200 tampons or pads. There is a small embedded carbon cost in the silicone of the cup and the synthetic fibres in pants — but it's one to two orders of magnitude smaller than the disposable equivalent.
Which period product is best for your flow?
Light flow (under 30 ml total cycle)
Period pants alone are usually enough — even a light-rated pair has more capacity than your day's flow. A small menstrual cup also works well. Tampons can feel uncomfortable on light flow because there isn't much fluid to lubricate the cotton against the vaginal wall.
Fearless period pants — designed for lighter flow days
Medium flow (30–60 ml total cycle)
All four products work. The cup is the cheapest and most convenient; pants are the most comfortable; tampons and pads are fine but the most wasteful option.
Heavy flow (60–80 ml total cycle)
A menstrual cup or heavy-flow period pants are both great options. Many people also prefer combining them on their heaviest days for extra protection and peace of mind. Pads and tampons can work too, but you'll likely need to change them more frequently.
Very heavy flow (over 80 ml total cycle, or saturating in under 2 hours)
Cup-plus-pants is the practical answer. A high-capacity cup (28–34 ml) can be emptied every 6-8 hours; pants catch any overflow. If you regularly produce more than 80 ml per cycle or saturate a high-capacity tampon in under two hours, mention it to your GP, that's clinically defined as menorrhagia and is worth investigating.
Which period product fits your lifestyle?
Active people (gym, running, sport)
Menstrual cups and period pants are both excellent options for staying active. A cup is invisible, has no string, and can be worn for up to 12 hours without needing to be changed. Period pants are also designed to stay securely in place and provide reliable leak protection during exercise, with activewear styles from some brands offering extra support and breathability. Tampons are another option, though they require more frequent changing.
Sleep
Period pants win, full stop. They were practically designed for sleep. Cup-plus-pants is even better on heavy nights.
Travel
Cup-plus-pants is unbeatable for long flights and travel days. You insert before you leave and you don't think about it again until you've landed.
Swimming
Tampon or cup. Standard period pants don't work in water — they'll fill up. Some brands sell dedicated period swimwear with different absorbent construction.
Teens and first periods
Period pants. No insertion, low anxiety, and they feel like normal underwear. Cups and tampons can come later. We've written a full first-period guide for teens and parents that goes deeper into sizing, school days and how many pairs to start with.
Working in healthcare, hospitality, or any all-day-on-your-feet job
Cup-plus-pants is the standout setup. You insert a cup before a 12-hour shift, you wear pants underneath your scrubs or uniform, and you don't have to find a private bathroom every two hours.
Post-partum bleeding
Heavy maternity pads are recommended during the first few days after birth, when postpartum bleeding (lochia) is heaviest. As bleeding gradually becomes lighter over the following 4–6 weeks, many people switch to lighter maternity pads or regular sanitary pads. Internal products, including menstrual cups and tampons, should be avoided until your healthcare provider says it's safe to use them again. Some heavy-flow period pants are marketed as suitable for postpartum use and can be a practical option once the heaviest bleeding has eased, but always follow the brand's guidance and your midwife's or doctor's advice.
A fair word on disposables
We've made the case for reusables. We should also be fair about why disposables still dominate the UK market: they're available everywhere, the up-front cost per unit is tiny, and the routine is one most people learned as a teenager. There are good reasons to keep a small stash of disposable pads in the back of a drawer — for the day your washing machine breaks, the day a friend visits unexpectedly, the holiday where you don't want to deal with washing pants in a hotel sink, or the first six weeks post-partum.
Switching to reusables doesn't have to be all-or-nothing. Many people use a cup and pants 90% of the time and keep a small backup of organic disposable pads for edge cases. That hybrid approach captures most of the cost and waste savings without the inflexibility of going completely disposable-free.
