S21 Double Wearable Breast Pump-Tranquil Grey

Key Features
- Pump Weight: 230g
- Product Dimensions: 122 mm x 110 mm x 68 mm
- 3 Modes: Stimulation/Expression/Auto Mode for customized use
- 12 Levels: Adjustable intensity for precise comfort
- Suction Strength: Hospital-grade, up to -280mmHg per side
- Auto Shut-off Time: 30 minutes
- Usage Time: 150 mins / 5-6 sessions
- Charge Time: About 2 hours (compatible with 5V 1A adapter)
- Noise Level: Under 45dB
- Display: LED screen
- Capacity: 6oz leak-resistant cups
- Cleaning: 4 parts, dishwasher safe (under 90°C/194°F)
- Certification: Mom tested & FDA approved
We have such a guide exclusively to solve this problem of moms, you can check the guide on how to measure your flange size.
What's included
- 2 MomMed S21 Pumps
- 2 USB Cables (Type-C)
- 2 Milk Containers (6 oz)
- 2 Silicone Flanges (24 mm)
- 6 Flange Inserts (2 each of 17mm, 19mm, and 21mm)
- 4 Silicone Diaphragms
- 6 Duckbill Valves
- 10 Milk Storage Bags
- 1 Nipple Ruler
- 2 Nursing Bra Extenders
- 1 Breastfeeding Guidebook
- 1 User Manual
Find more S21 accessories here




Why other moms love us!





MomMed LuxerFlow™ Technology
New S21 Series - Data-Driven Excellence
"Engineered through clinical insights from 10,000+ nursing mothers, our LuxerFlow™ system delivers optimized expression rhythms that match natural feeding patterns. Clinically proven to achieve 45% greater milk output compared to standard pumps."

Gentle Expression
Biomechanical Comfort Redefined
"Our hospital-grade soft silicone cushions and precision vacuum pump work in harmony to replicate an infant's natural suckling motion (45-220 mmHg range). Experience zero discomfort while maintaining peak milk flow efficiency."

Effortless Emptying
Complete Drainage, Maximum Output
"The Dynamic Vacuum Algorithm intelligently alternates between stimulation and expression phases, achieving 98% milk drainage efficiency - 35% faster than conventional pumps."

For Your Milk, For Your Well-Being
Holistic Pumping Philosophy
"Beyond milk collection, we champion maternal wellness through precision-engineered customization: 3 Smart Modes × 12 Micro-Adjustable Levels = 36 Personalized Expression Programs."

Effortless Emptying
Certified Protection System
"Multi-layered safety standards validated through:
✓ FDA 510(k) Cleared Medical Device
✓ CPC Child-Safe Material Certification
✓ BACL International Lactation Compliance
✓ ISO 13485 Quality Management System"
Safety Commitment:
- Triple Validation Process (Material/Electrical/Biological)
- 2000+ Hour Endurance Testing
- 24/7 Pump Performance Monitoring
Here's How We Compare
Frequently Asked Questions
What makes MomMed pumps different from traditional breast pumps?
MomMed pumps stand out from traditional breast pumps due to their innovative design and user-centric features. They are hands-free and cordless, offering unparalleled convenience for busy mothers. Our pumps are lightweight, compact, and quiet, ensuring discreet use anywhere. With multiple modes and adjustable intensity levels, they provide a comfortable and efficient pumping experience. Additionally, MomMed pumps come with advanced features like LED display screens, long-lasting rechargeable batteries, and ergonomic flanges that fit most breast shapes, making them both practical and highly effective for daily use.
How do I assemble and clean the MomMed S21 Breast Pump?
To assemble the MomMed S21 wearable breast pump, align all parts securely as shown in the user manual. Make sure the silicone flange and diaphragm are properly seated. For cleaning, disassemble all washable parts and sterilize with boiling water or a sterilizer. Avoid washing the motor unit. Proper cleaning ensures optimal suction and hygiene.
Can I pump from both breasts at the same time with the S21?
Yes! The S21 is a double electric breast pump, meaning you can pump from both breasts simultaneously. This not only saves time but can also help increase your milk supply by mimicking your baby's natural feeding pattern.
Is the MomMed S21 suitable for nighttime use?
Definitely. The ultra-quiet motor and gentle suction settings make the S21 perfect for nighttime pumping without disturbing your sleep—or your baby’s. The soft LED display also makes it easy to adjust settings in low light.
How do I know if the suction is too strong or too weak?
With 3 pumping modes and 12 intensity levels, the S21 allows for precise adjustments. If you experience discomfort or minimal milk flow, try lowering or raising the suction level until it feels natural and efficient. Every mom’s comfort zone is different!
How often should I replace the pump parts?
To maintain performance and hygiene, we recommend replacing silicone parts—like the duckbill valve and diaphragm—every 1 to 2 months, especially with regular use. Replacement kits are available in our store.
Does the S21 support milk collection for storage and feeding later?
Absolutely. The S21 allows you to collect milk directly into the container, and you can easily transfer it to storage bags or feeding bottles afterward. It’s a great solution for building a breast milk stash.
Is this breast pump easy to carry when traveling?
Yes, the MomMed S21 is designed with portability in mind. It’s lightweight, cordless, and fits easily into a diaper bag or purse. Ideal for moms who pump on the go or travel frequently.