Period underwear vs. reusable cloth pads: what each does better

What a cloth pad is, and how it attaches

A cloth pad is a shaped piece of absorbent fabric that wraps the crotch of your own underwear and fastens underneath with snaps. GladRags tells you to snap the holder around your underwear, and its Day Pad is a holder with inserts that slide in: one insert for light flow and two for moderate, which it likens to a standard maxi pad. Aisle describes one of its liners as three inches wide when snapped around your underwear. So a pad is not underwear. It is a layer that rides in whatever underwear you put it in.

Period underwear moves that layer inside the garment. The panel is sewn into the gusset, so there is nothing to fasten, nothing to position, and nothing that can come loose. That one difference explains most of what follows. Aisle is worth naming here, because it sells both reusable pads and period underwear, and its underwear is in our catalog.

Capacity, leaks and staying put

Cloth pad makers state capacity as a tampon count, not in millilitres. Aisle lists its Super Pad at 8 Tampons and its Extended Liner at 4 Tampons, and says its pads absorb 8X more than disposables. GladRags gives no number and describes flow by inserts. No maker page we read publishes a millilitre figure for a cloth pad, so there is nothing to convert, and we do not convert it for them. That matters, because a tampon is not a unit: our table records Thinx's tampon basis at 9 mL where most brands use about 5 mL.

Period underwear is the side with numbers. Tier ceilings in our table run from about 5 mL to about 108 mL: WUKA Light at 7 mL, Knix Light at 5 to 15 mL, Modibodi Super at 50 mL, WUKA Super Heavy at 60 mL, and Knix Ultra at up to about 99 mL, the highest figure any brand states in millilitres. The 108 mL at the top is computed, not published, because Thinx says its period line holds up to 12 regular tampons' worth and prints no millilitre number. Each figure is graded for how well it is evidenced, and they share a unit, which is why a pair can be compared across brands and a cloth pad cannot.

On staying put, construction decides it. A pad that snaps around your underwear is held by the snap and by the fit of whatever it is snapped into, so it can shift; a sewn-in panel cannot move at all. That is a mechanical fact rather than a verdict, and it is why people who run, cycle or lift usually end up in a pair. The exercise guide covers what to look for in a pair for movement.

Washing and drying

Both are laundry, and the instructions are nearly identical. Aisle says to machine wash cold, no fabric softener or bleach, and dry on low heat, with its liners laid flat to dry. GladRags says to machine wash cold using a natural detergent and tumble dry low or line dry. That is the routine period underwear asks for too, so switching changes nothing about wash day except the number of pieces going in.

Drying is where people expect a difference, and the maker pages are more careful than the internet is. Neither GladRags nor Aisle claims a cloth pad dries faster than a pair, so we are not going to say it. What the pages do show is that a pad comes apart: the GladRags Day Pad is a holder plus removable inserts, so the layers dry separately, while a pair dries as one stack of bonded layers. Drying time comes down to how many layers are stacked and how you dry them, and the drying guide covers the pair side.

Cost and lifespan

Per item, the two are closer than people expect. As of 2026-09-05, GladRags lists its Day Pad at $18.00, Aisle lists its Super Pad at a $25.00 regular price, and a two-pack of Extended Liners at $34.00. Current period-underwear prices are in the catalog, which stays right as the market moves. Neither category is the cheap one.

Lifespan brings the units problem back. GladRags says its pads are guaranteed to last 5+ years. Aisle says its stitched seams hold up through 100+ washes. Both are maker claims, and they cannot be lined up without knowing how often you wash. For period underwear the lifespan guide covers what brands estimate and the signs a pair has lost capacity. One more thing shapes cost: a cloth pad needs underwear to snap into, which you already own, while a rotation of pairs replaces part of your drawer.

Stacking a pad on a pair

The two are not rivals for people who already own both. A cloth pad inside a pair is a common heavy-day setup: the pad takes the first hit and can be swapped in a stall, the pair catches edge leaks, and the wider gusset holds the pad steadier than regular underwear does. The pair's own capacity is barely touched, so a light or moderate tier is enough underneath. The backup guide covers the combinations.

Sources

The facts above trace to:

• Snapping the holder around your underwear, one insert for light flow and two for moderate, the maxi-pad comparison, the cold wash with a natural detergent, tumble dry low or line dry, the 5+ year guarantee and the $18.00 price: GladRags, "Day Pad." Read 2026-09-05.
• Aisle pad capacity as 8 Tampons and 4 Tampons, the snapped-around-your-underwear description, the cold wash with no fabric softener or bleach, dry on low heat, lay flat to dry, 100+ washes, and the $25.00 and $34.00 regular prices: Aisle, "Super Pad" and "Extended Liner" product pages. Read 2026-09-05.
• The claim that Aisle pads absorb 8X more than disposables: Aisle, "The Best Reusable Pads" collection. Read 2026-09-05.
• Underwear tier ceilings in millilitres, including the computed Thinx figure, and Thinx's 9 mL tampon basis where most brands use about 5 mL: our absorbency table, which grades each figure for sourcing.
• Current period-underwear prices: our live catalog, not a fetched brand page.