If you’ve searched for adult or older-child incontinence products and landed on the iD range, you’ve probably noticed it’s not a simple two-product lineup. iD Expert (made by Ontex) produces a broad spectrum of absorbent products — from pull-up pants to fully taped briefs — and the naming conventions aren’t always obvious. This guide breaks down iD Expert Slip versus iD Pants clearly, so you can choose the right product the first time.
What Is the iD Product Range?
iD Expert is a continence product brand manufactured by Ontex, a Belgian healthcare company. Their range covers light, moderate, and heavy incontinence across multiple formats. The two main categories most people are comparing are:
- iD Pants — pull-up style, worn like underwear
- iD Expert Slip — taped brief (nappy-style), fastened at the front
Within each category there are multiple absorbency levels, sizing tiers, and sub-ranges. That’s where the confusion usually starts.
iD Pants: The Pull-Up Format
iD Pants are designed to be pulled up and down like normal underwear. They’re a practical choice for people who are ambulatory, prefer discretion, or are managing lighter to moderate nighttime or daytime wetting.
Key features
- Elasticated waistband and leg openings
- Tearable side seams for easy removal — useful if soiled
- Available in multiple absorbency levels (Normal, Plus, Super, Maxi)
- Sizes typically from S/M through to XL or XXL depending on the sub-range
- Relatively slim profile under clothing
Who iD Pants tend to suit
- Older children and adults who manage their own toileting independently
- Those with moderate wetting who want something closer to underwear
- People who need containment during the day as well as overnight
- Users where the pull-up format is preferred for dignity or sensory reasons
It’s worth noting that pull-up formats — including iD Pants — have inherent design constraints when used overnight. The leg cuffs that work well upright can compress against the body when lying down, which changes how liquid is distributed and where leaks occur. If overnight leaks are your main problem, this is worth understanding before you buy. The article on what happens to pull-up leg cuffs when a child lies down goes into this in detail.
iD Expert Slip: The Taped Brief Format
iD Expert Slip is a fully taped product — it opens flat and is fastened around the wearer using adhesive tabs, in the same way a nappy is fitted. This format is sometimes called a “pad and pant” or simply an “adult nappy,” though the latter term is often avoided because of its stigma. That stigma is largely undeserved: for heavy wetting, overnight use, or people with limited mobility, taped briefs are frequently the most effective option available.
Key features
- Refastenable adhesive tabs — can be adjusted without full removal
- Larger absorbent core than equivalent pull-up products
- Better containment at the back and legs due to the wrap-around fit
- Available in Normal, Plus, Super, Maxi, and Maxi Plus absorbency levels
- Sizes from Small to Extra Large
- Can be applied by a carer without the wearer needing to stand
Who iD Expert Slip tends to suit
- Heavier wetters — those producing large volumes overnight
- People with mobility limitations who cannot easily stand for a pull-up
- Carers who need to change a product without the wearer standing
- Anyone for whom pull-ups have repeatedly leaked and alternatives are needed
- Older children or adults where maximum containment is the priority
For those managing complex care needs — including children with disabilities or neurodivergent users — taped briefs are sometimes the only format that reliably contains heavy overnight output. There is no clinical or social reason to avoid them if they work.
Absorbency Levels Compared
Both iD Pants and iD Expert Slip use a shared naming convention for absorbency, but the actual volumes differ between formats because the Slip has a larger core.
| Level | iD Pants (approx. ml) | iD Expert Slip (approx. ml) |
|---|---|---|
| Normal | 800–900 ml | 1,400–1,600 ml |
| Plus | 1,000–1,200 ml | 1,800–2,000 ml |
| Super | 1,400–1,600 ml | 2,200–2,500 ml |
| Maxi | 1,800–2,000 ml | 2,800–3,000 ml |
| Maxi Plus | Not available | 3,200–3,600 ml |
Note: Figures are approximate and based on manufacturer ISO test data. Real-world performance varies depending on body position, wetting rate, and individual factors.
Sizing: Getting It Right
Both ranges size primarily by hip/waist measurement. The general guide is:
- Small: 60–90 cm hip
- Medium: 80–110 cm hip
- Large: 100–150 cm hip
- Extra Large: 130–170 cm hip (Slip range)
If you’re between sizes, size up for a taped brief (you can adjust the tabs) and size down for a pull-up (a looser leg fit increases leak risk). For children, check the specific product’s sizing chart rather than relying on age — body measurements are more reliable.
Which Format Is Right for Your Situation?
There’s no universally correct answer. Both formats are legitimate, both work for the right user, and neither is a step up or step down from the other.
Consider iD Pants if:
- The wearer manages their own continence care independently
- Discretion under clothing matters during the day
- Wetting volume is moderate and overnight leaks are not a persistent problem
- The user has sensory preferences around bulk or feel
Consider iD Expert Slip if:
- Overnight leaks are frequent despite trying pull-up formats
- Wetting volume is high — multiple full voids per night
- A carer assists with changes and lying-down application is easier
- You’ve exhausted pull-up options and need greater structural containment
It’s also worth considering whether bed protection should form part of the solution regardless of product format. A mattress protector and waterproof fitted sheet provide a secondary layer of protection that removes the consequence of any product leak — which is often the most practical decision for families managing this every night. If the emotional and physical toll of overnight changes is becoming a real pressure point, this piece on managing night changes without burning out is worth reading alongside product decisions.
Prescriptions and NHS Access
iD Expert Slip products are available on NHS prescription in England, Scotland, Wales, and Northern Ireland for those who meet the clinical threshold for continence product provision. iD Pants may also be available depending on your local NHS continence service. Access varies significantly by area — a continence nurse or GP can advise on what your local integrated care board (ICB) will provide.
If you’re buying privately, both ranges are widely stocked through online medical suppliers, pharmacies, and directly from the iD website. Buying in bulk typically reduces per-unit cost substantially.
A Note on Stigma
Taped briefs — including the iD Expert Slip — carry an undeserved stigma in some communities, particularly when used for older children or teenagers. The format is simply better engineering for certain use cases. If it contains wetting reliably and gives the wearer a dry, comfortable night, that’s the relevant measure. The conversation around talking about bedwetting without shame applies equally to product choices — the goal is always comfort, dignity, and sleep, not conformity to a perceived norm.
Conclusion
Understanding the difference between iD Expert Slip and iD Pants comes down to format, absorbency capacity, and fit to your specific situation. iD Pants offer a discreet pull-up format suited to moderate wetting and independent users. iD Expert Slip offers higher absorbency, better structural containment, and a taped format that works for heavier wetting and assisted care. Both are well-made, clinically credible products — the right choice is the one that works for the person wearing it. If you’re still experiencing leaks despite trying both formats, it’s worth looking at why overnight products leak by design, and whether additional product layers or a different approach is needed.