Disclosure: I'm an AHPRA-registered midwife and IBCLC, and I do earn a commission if you buy a Lacevo S70 using code THEBREASTHELP or the link in this article, at no extra cost to you. That relationship doesn't change what I've written below. Full disclosure at the end of this article.

Yep, that’s me!
I have the privilege of being invited to work as the IBCLC and Midwife at Sydney Baby Expos for Lacevo

My favourite part of this work is helping families learn about wearable pumps, explain how milk making works and encourage them to get informed before making big any rushed purchases in pregnancy.

Wearable, in-bra pumps have become one of the most-asked-about categories in my clinic — mostly from mums who want to pump without being tethered to a wall, a cord, or a nursing chair. The Lacevo S70 is one of the more fully-featured options in that category, so I've gone through its specs, its sizing system, and where it fits (and doesn't) into a real pumping routine.

This isn't a sponsored post written by Lacevo — it's my own assessment, informed by what actually matters clinically when someone is choosing a pump: flange fit, suction control, hygiene, and realistic expectations about output.

Quick Verdict Worth considering if you:

Want a genuinely hands-free, in-bra pump for multitasking, commuting, or pumping discreetly at work
Have struggled with flange fit on other pumps and want access to multiple sizes out of the box
Want both a stimulation phase and an expression phase available on the same device
Are comfortable with a higher upfront price point in exchange for a more complete kit (spares, case, sizing tools included)

Might not be the right fit if you:

Are on a tight budget — wearable pumps in this bracket are a significant spend compared to standard double electric pumps
Want the slimmest, most tubeless-in-cup style of wearable (the S70 sits in-bra with a longer flange tunnel rather than an ultra-low-profile cup)
Are currently in pain when pumping or expressing — no pump fixes an underlying fit or latch issue, and you should see an IBCLC for an assessment before buying anything

What Is the Lacevo S70?

The Lacevo S70 is a wearable, hands-free breast pump set designed to sit inside your bra rather than connect to an external unit via tubing. Each pump motor attaches directly to a 180ml collection cup, and the whole unit is controlled either via an on-pump LCD screen or the Lacevo+ smartphone app.

It is also endorsed by the Australian Breastfeeding Association

It comes as a set of two, along with a sizing kit, hard carry case, and a range of accessories.

Price: $499 AUD (check current price before publishing — subject to change)

Suction levels: 12

Modes: 4 — automatic, stimulation, mixed, expression

Suction strength: Up to 290mmHg (Lacevo's own spec, described by the brand as “hospital-grade”)

Collection capacity: 180ml / 6oz per side

Battery: 1200mAh, USB-C rechargeable, manufacturer estimates 4–6 sessions per charge

Noise level: Under 45dB (manufacturer spec)

Flange sizes included: 13mm, 15mm, 17mm, 19mm, 21mm (sizing kit) plus standard 24mm silicone flange Control On-pump LCD screen or Lacevo+ app (iOS and Android)

What's in the box?:

2 pump motors,
2 collection cups,
diaphragms,
valves,
24mm flanges,
dust covers,
hard case,
wet bag,
USB-C cables,
cleaning brushes,
bra strap extenders,
sizing kit

Warranty: 12 months on the motor, 90 days on replacement parts (starts from your baby’s date of birth if you purchase in pregnancy)

Why Flange Fit Matters More Than the Pump Itself

Whichever pump someone chooses, the single biggest factor in comfort and effective milk removal is flange (breast shield) fit — not suction strength, brand, or price. A flange that's too small or too large can cause pain, nipple damage, and reduced output, regardless of how powerful the motor is.

In my clinical experience, a large proportion of mums using ill-fitting flanges were never re-measured after their nipple size changed in the weeks after birth — which is completely normal and expected. This is genuinely one of the more useful things about the S70's kit: it ships with a measuring tool, mirror, and five additional flange inserts (13–21mm) alongside the standard 24mm flange, so you have a real chance of finding a comfortable fit without buying separate parts. That said, no size kit is a substitute for a proper fit check if you're in pain — see an IBCLC if a session hurts.

Hands-Free Design and Performance

The S70 sits inside your bra (Lacevo includes bra strap extenders to help with fit across bra sizes), which means no external tubing to a plug-in unit and, in theory, more freedom to move, hold your baby, or work through a pumping session.

It offers four modes — automatic, stimulation, mixed, and expression — and 12 suction levels. In practice, most people use a stimulation-style mode briefly to encourage let-down, then move into an expression mode set at whatever level feels strong but not painful. Lacevo describes its top suction levels as “hospital-grade” (up to 290mmHg); this is the brand's own terminology rather than an independently regulated classification, but a wide adjustable range is genuinely useful — it means the same pump can suit someone who finds strong suction uncomfortable as well as someone who needs a firmer setting.

A fill sensor alerts you as the 180ml cups approach capacity, with an option to disable it in the app if you're moving around a lot and don't want false alerts.

What's in the Box

At $499 AUD, the S70 sits at the higher end of the wearable pump market, so it's worth weighing up what's included rather than comparing sticker price alone. The set comes with two pump motors, two 180ml collection cups, spare valves and diaphragms, the 24mm flange plus the five-size sizing kit, a hard case with a wet bag for on-the-go storage, USB-C charging cables, cleaning brushes, and bra strap extenders. Buying these components separately for a cheaper base pump can close the price gap more than it first appears.

Pros

Six flange sizes available out of the box, which meaningfully lowers the barrier to finding a comfortable fit
Wide, 12-level suction range with a dedicated stimulation phase, useful across different comfort levels and stages of a feed/pump session
Genuinely hands-free, in-bra design with app control, useful for pumping in meetings or shared spaces
Comes as a complete kit — spares, case, and cleaning accessories included rather than sold separately
12-month motor warranty is on par with, or better than, many competitors in this category

Things to Consider

Price point is high relative to standard (non-wearable) double electric pumps, which may still suit some budgets and needs better
Correct flange sizing still takes some trial and error, even with six sizes to choose from
Manufacturer battery estimates (4–6 sessions) will vary with suction level, mode, and session length — treat this as a guide, not a guarantee
If you're pumping because of pain, latch difficulty, or supply concerns, a new pump alone won't resolve the underlying issue — book an assessment with an IBCLC first

How I'd Suggest Using It

If you're starting out with the S70 (or any wearable pump), a few practical habits make a real difference:

Measure your nipple diameter with the sizing kit before your first full session — and remeasure a few weeks postpartum, since size commonly changes
Start on a stimulation-style mode for a couple of minutes to encourage let-down, then switch to an expression mode
Choose the highest suction level that's comfortable, not the highest level the pump offers — more suction isn't automatically more output, and pain during pumping is not something to push through
Follow Lacevo's cleaning instructions (warm soapy water, then sterilising) and never microwave the parts, as noted in their care guidance
If output, comfort, or supply doesn't improve after a fit check and a few sessions, see an IBCLC — pump troubleshooting is exactly what we're trained for

Frequently Asked Questions

“Hospital-grade” isn't an officially regulated term in Australia the way it is sometimes assumed to be — it's industry shorthand generally used for pumps with a closed system (no risk of milk entering the motor) and a strong, adjustable suction range. Lacevo applies this description to its higher suction settings (up to 290mmHg). It's a reasonable descriptor of performance, but it isn't a formal certification.
As a starting point, measure your nipple diameter (not areola) when relaxed, not compressed. Being open to experimenting with the given flanges will help you find your perfect size.
The S70's sizing kit covers 13– 24mm, which suits most people, but if you're still in pain after trying a couple of sizes, it's worth a proper in-person or telehealth check with an IBCLC rather than continuing to guess.
I have a blog on flange sizing here
For many mums, yes — particularly for maintaining supply once breastfeeding is established. If you're an exclusive pumper with high volume needs, recovering from a difficult birth, or establishing supply for a baby who can't yet feed at the breast, you may still want access to a hospital-grade rental pump for part of your journey. This varies a lot person to person, which is exactly the kind of thing worth discussing with an IBCLC.
Lacevo states 1200mAh with USB-C charging, estimated at 4–6 sessions depending on suction level and session length. As with any battery-powered pump, expect real-world results to vary.
It can be — many exclusive pumpers use wearable pumps as their main or supplementary device. If you're exclusively pumping, keep an eye on output trends over time and check in with an IBCLC if you notice a drop, since this is more reliably picked up early with professional support than by troubleshooting a device alone.
You can view current pricing and buy directly from Lacevo here: Lacevo S70 wearable breast pump set. Enter code THEBREASTHELP at checkout.

The Lacevo S70 is a well-specced wearable pump, and the sizing kit in particular addresses one of the most common reasons pumping is uncomfortable in the first place. It's a genuine investment rather than an impulse buy, so it's worth being clear-eyed about your own pumping needs, budget, and any comfort or supply issues before purchasing — and getting those checked by an IBCLC regardless of which pump you choose.

If you've decided the S70 is right for you, you can buy it here and use code THEBREASTHELP at checkout. And if you'd like personalised support with pumping, flange fit, or supply — wearable pump or otherwise — get in touch with me here.

Full Disclosure

I am an AHPRA-registered midwife and International Board Certified Lactation Consultant (IBCLC). I am an independent affiliate for Lacevo and earn a commission on purchases made through the code THEBREASTHELP or the links in this article, at no extra cost to you.

This article is my own professional opinion, based on publicly available product information and my clinical experience; it has not been reviewed, edited, or approved by Lacevo. Product specifications are drawn from the manufacturer and may change — please confirm current details before purchasing.

This article is general information only and does not replace an individualised lactation consultation. If you are experiencing pain, low milk supply, or other breastfeeding or pumping difficulties, please see an IBCLC or your healthcare provider for a full assessment.

Lacevo S70 Wearable Breast Pump: A Midwife & IBCLC's Honest Review