Effortless Volume, Undetectable Lift

Enhance natural curves instantly with our waterproof silicone and breathable foam inserts. The invisible secret behind every perfect silhouette.

The Inserts Collection

Targeted solutions for volume, lift, and shape correction.

It seems we can't find what you're looking for.

Silicone vs. Foam: Choosing the Right Core

Silicone mimics the weight, bounce, and warmth of natural breast tissue. It is non-absorbent, making it the ONLY choice for swimwear as it won’t get heavy when wet.
Foam is featherlight and breathable. It adds volume without adding weight, ideal for sports bras where sweat management and comfort are priorities.
All our inserts can be molded with tapered edges (not just cut). This ensures they sit flush against the breast curve without creating visible ridges.
Silicone vs. Foam Choosing the Right Core

Why Source Inserts from SyncoSil?

100% Waterproof Tech

100% Waterproof Tech

Our silicone inserts are sealed using high-frequency welding or integral molding, ensuring absolutely no water intake—vital for high-end swimwear brands.

50+ Existing Molds

50+ Existing Molds

Save on mold costs. We have an extensive library of shapes (triangle, round, abalone, push-up) ready for immediate production.

Retail-Ready Packaging

Retail-Ready Packaging

We offer custom blister packs, zipper bags, and gift boxes. We can also kit inserts with other accessories for higher value bundles.

ISO 10993 Certified

Safety is non-negotiable. Our Wacker silicone passes strict biocompatibility tests (Cytotoxicity, Sensitization, Irritation).

Mass Production Capacity

High-speed production lines for global fulfillment.

Material Prep

Cutting high-density foam or mixing liquid silicone components.

Heat Molding

Pressing materials into 3D ergonomic shapes under high heat.

Trimming & Sealing

Laser trimming edges or sealing silicone borders to prevent leakage.

Pairing & Packing

Quality check and pairing left/right inserts into retail packaging.

Customize Your Inserts

Create unique shapes or branded inserts to differentiate your swimwear or lingerie line.

Custom Shapes

Triangle: For bikini tops; Oval/Round: For sports bras; Kidney/Half-Moon: For push-up effect.

Thickness & Weight

Specify your desired thickness and weight (light foam vs. heavy silicone) to meet your design specs.

Fabric Covering

For foam pads, we can laminate with various fabrics: cotton jersey, sports mesh, or smooth satin in custom colors.

Branding

We can print your logo directly on the fabric surface of foam pads or emboss it into silicone inserts.

Packaging Customization

Frequently Asked Questions

+ Can silicone inserts be used in swimming pools?
Yes! Our silicone inserts are 100% waterproof and chlorine-resistant. They won't absorb water or get heavy, making them perfect for pool and beach use.

+ Do they stay in place?
Our silicone inserts have a natural surface tackiness that grips to the skin or swimwear fabric, preventing shifting. For foam pads, they are usually inserted into bra pockets.

+ What is the MOQ for custom shapes?
If you use our existing molds (50+ shapes), MOQ is low (100 pairs). For a completely new custom mold, MOQ starts around 3,000 pairs due to tooling costs.

What is the difference between "Adhesive" and "Glue-Free"?

Standard adhesive uses a medical-grade bio-gel for strong hold. “Glue-Free” relies on body temperature and vacuum suction, ideal for users with extremely sensitive skin or silicone allergies.

How long does the stickiness last?

With proper care (washing with mild soap after use), our covers retain effective adhesion for 30+ wears.

Can I get a sample kit with all skin tones?

Yes! We offer a “Color Ring” sample kit that includes our 6 standard skin tones plus material swatches for quality testing.