MomMed S21 vs S33: Which Breast Pump Serves You Better?

MomMed S21 vs S33: Which Breast Pump Serves You Better?

Navigating the crowded breast pump market to find the right one is a significant challenge for new moms. With so many models claiming similar advantages, cutting through the marketing noise requires clear comparative analysis. This guide focuses on MomMed, renowned for its high cost-effectiveness and strong user loyalty. Through comprehensive analysis of team testing and user feedback, we compare the flagship MomMed S21 breast pump with the new S33 luma breast pump to help you make an informed and confident choice. 

At A Glance: S21 VS S33 Luma

MomMed S21: The S21 focuses solely on pumping, offering 12-level suction control to provide customization for mothers seeking a more personalized fit. With proven reliability, greater discount, and lighter weight, it delivers a comfortable and efficient experience.

MomMed S33: The S33 is designed to address specific challenges moms face in daily life. It features a gentle glow for nighttime feeds, a pause button for unexpected moments, and a massage mode for relaxation and easier letdown. In all, it’s about a smoother, more intuitive pump session that gets you to comfort and efficiency faster. 　

Side-by-Side: A Look at What Matters Most

In this section, we walk through a side-by-side comparison of the S21 and the S33 across 7 critical factors moms frequently consider when selecting breast pumps, ending with a complete data table. 

Night Light

Visibility in darkness is likely the most significant distinguishing feature between the two breast pumps. The MomMed S21 maintains a pure, minimalist design ideal for all-day use, making it an excellent choice for moms who need to pump multiple times during the day. The S33 is tailored for nighttime convenience, adding a built-in light with a frosted finish to provide visibility without disrupting sleep, making it more suitable for moms who frequently pump at night.

Efficient Milk Removal

• Suction: Both the S21 and S33 have a maximum suction strength of 280mmHg, which is relatively high among non-hospital-grade breast pumps. This can offer a good balance between effectiveness and comfort. Some users who have tried both products have stated on social media that the S21 has slightly stronger suction than the S33, though this still requires further verification.
• Mode: The MomMed S21 and the S33 share three primary modes for handling perfectly the core functions of pumping: Stimulation mimics the baby’s sucks to trigger let-down, Expression helps to efficiently empty your breast well, and Auto Mode conveniently runs the entire pumping cycle. Where the S33 differs is its introduction of a new Massage Mode, designed to gently ease breast fullness and promote relaxation before pumping.
• Level: In terms of suction levels, the MomMed S21 offers 12, compared to the S33’s 9. This means the MomMed S21 enables more precise adjustments to match different pumping stages and breast conditions. However, the S33 is designed for users seeking a streamlined experience, simplifying the selection process to help them find their comfort zone faster while balancing suction strength and comfort.

Comfortable and Reliable

• Flange: The S21 and the S33 both come with three insert sizes (17mm, 19mm, and 21mm) compatible with the 24mm flange, covering the needs of most mothers. A nipple ruler is also provided to help determine which insert size is most suitable, ensuring a tighter seal and more efficient pumping. 
• Leak Prevention: The classic leak-proof design of the S21 has provided reliable daily protection against leaks for tens of thousands of moms. The S33 features a silicone anti-leak stopper added to the flange edge, offering moms extra assurance while on the move.

Lightweight and Convenient

• Wearable: MomMed specials in wearable breast pumps designed for complete hands-free use, requiring no power cords or tubes. With their similar breast-like hemispherical design, the S21 and S33 can be discreetly worn with any bra or clothing, offering moms the same convenience for private and efficient pumping anytime, anywhere.
• Mobility-Pause: Another standard feature of the MomMed S33 is its highly user-friendly pause function. It proves incredibly useful for moms who struggle to find extended, uninterrupted pumping sessions in their daily routines. While the S21 is better suited for moms who can typically secure dedicated quiet time for pumping.
• Weight: Both breast pumps feature a lightweight design, with each unit weighing under 250 grams. The S21 is particularly light at just 226 grams, making it a more portable and comfortable option while still offering the same 6oZ milk storage capacity.
• Assembly & Cleaning: The S21 and the S33 each consist of only five parts: motor, diaphragm, duckbill valve, milk container, and flange. Only the latter four require cleaning. Assembly is as simple as shown in the diagram, greatly reducing mom’s worries.

Long-Lasting Battery

• Battery Life: In terms of battery performance, both the S21 and the S33 deliver consistent results with a runtime of approximately 150 minutes. Based on 20-25 minutes per session, this supports 5-6 full pumping cycles, making it sufficient for daily commutes or even short trips and significantly reducing range anxiety.
• Charging: Using a compatible 5V/1A charger takes about 2 hours to fully charge. While not particularly fast, considering its extended battery life, this does not pose a significant burden in practical use.

Quiet Operation

Their operating noise is both below 45 dB, which won’t disturb the sleep of either mother or baby. Instead, it creates a gentle, soothing background sound that helps you relax. In settings like offices or public transport, pumps are unlikely to draw any attention. 

Price

The original prices of the MomMed S21 and S33 on Amazon UK are nearly identical at £99.99 and £99.98 respectively, though promotional offers vary based on individual circumstances. Generally speaking, the MomMed S21 offers greater discounts, while the S33 may return to its original price after the initial  promotional period for new products. Promotions are subject to change at any time, we recommend confirming the final price at checkout. 

In summary, the specific parameter comparison between the MomMed S21 and the S33 is detailed in the table below:

Feature	MomMed S33	MomMed S21
Pumping Modes	4 (incl. Massage)	3
Suction Levels	9	12
Suction	– 280mmHg	– 280mmHg
Battery Life	5-6 sessions	5-6 sessions
Charging	2h	2h
Weight	248g	226g
Capacity	6oz	6oz
Price	£99.99	£99.99 (better discount)
Special Features (S33 only)	Night Light, Pause, Silicone Anti-Leak Stopper	/

Value Assessment:

The MomMed S21 Serves You Better If:

• You place greater emphasis on precise adjustments to the suction levels, seeking more control over the breast pump.
• Your pumping sessions are flexible and completely relaxing without having to move around. 
• You prioritize practical choices that offer high value for money. 
• You tend to favor low-risk, reliable products that have been proven by the market over time.

The MomMed S33 Serves You Better If:

• You prioritize a quick start, hassle-free, and smooth pumping experience.
• You frequently pump at night, tired of getting up to turn the lights on and off.
• You are often interrupted during pumping.
• You need a massage function to relieve breast discomfort before pumping.
• You’ll be delighted to choose a new model that combines the latest design concepts with user feedback.

Still Unsure? Make Your Choice in 2 Questions:

1. What’s your priority?

• Control & Value → S21
• Convenience & Considerate → S33

2. What’s your typical pumping scenario?

• Predictable, quiet, and daytime → S21
• Mobile, nighttime, or frequently interrupted → S33

Conclusion

Both the MomMed S21 and the S33 are excellent, reliable breast pumps. The final decision depends on what you value most. If you prioritize guaranteed performance with great value, the S21 serves you better; if you desire the latest conveniences that tackle specific modern hassles, then the S33 is the pump for you. Whichever you choose, a dependable MomMed pump will support you every step of the way. 

Guest Article.