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Most incontinence underwear will quote a ‘working capacity’ depending on movement, fit, and activity. You may also see a ‘Maximum Absorbent Capacity’ measured under standardised laboratory conditions.

‘Working capacity’ is around 40–50% of ‘Maximum Absorbent Capacity’. ISO standards refer to maximum capacity, sometimes reaching 3,000–6,000 mL in disposable products only.

Most reusable underwear holds 50ml–250ml — suitable for light to moderate leakage or one small accident. For higher capacity needs, inserts or changeable pads may be required.

One adult pee/wee can be 200–500 ml. Some products hold a full bladder, but most reusable underwear is designed for small leaks or one small accident. For heavy incontinence, choose high-absorbency disposables.

Yes — they absorb small leaks or unexpected urination. They are not nappies and cannot hold a full bladder or multiple accidents. Carry a spare and store used pairs in a dry bag for hygiene.

Most reusable underwear holds 50ml–250ml. High-capacity reusable options can hold up to 500ml. Always check the product details.

Some NHS areas provide incontinence products depending on local assessments. Washable underwear is less commonly provided than disposables.

You may be able to get free products through NHS continence services, charities, or care organisations. ERIC also offers guidance. Some products qualify for VAT exemption.

Fit — Prevents leaks and protects skin.
Absorbency — Choose based on leakage level.
Comfort & material — Breathable fabrics help.
Reusable vs disposable — Reusables save money.