Water-Resistant Structural Support Engineered for Aquatic Apparel
Maintain a flawlessly smooth, professional shape in your custom beachwear designs with Hemline Swimwear Bra Pads. A dedicated studio necessity relied upon by boutique swimwear brands, sample rooms, and home sewists, these specialized cups are engineered to endure the specific demands of aquatic environments. Whether you are drafting a classic one-piece swimsuit, constructing a custom bikini bodice, or retrofitting an off-the-rack summer top, these inserts provide clean, modest coverage and structural definition without distorting the design lines of your garment.
High-Density Water-Repellent Foam That Won’t Log or Sag
Unlike standard dressmaking bra cups that readily absorb water like a sponge—leaving garments heavy, sagged, and slow to dry—these swimwear pads are constructed from a specialized, low-porosity polyurethane foam. This advanced material composition resists water retention, ensuring the cups maintain their lightweight profile and natural molded contour even when completely submerged. The graduated padding geometry offers subtle, built-in lift and gentle upward support, preventing the flat or hollow appearance that can occur when wet, high-stretch Lycra or spandex applies pressure across the bust area.
Quick-Drying White Casing with Seamless Sew-In Versatility
Wrapped in a soft, non-irritating polyester knit cover, these cups are designed for permanent insertion into swimwear linings, interior pockets, or internal shelf-bra structures. The clean white colorway provides an excellent, zero-shadow foundation under vibrant summer patterns, light-colored swim materials, and athletic knit linings, preventing unwanted borders or dark circles from showing through under direct sunlight. Their flat, low-profile outer edges allow for quick hand-tacking, stay-stitching, or machine-sewing directly into hidden seams with absolutely minimal bulk.
Technical SpecificationsÂ
| Feature | Details |
| Brand | Hemline |
| Product Type | Pre-Formed Swimwear Bra Cups / Waterproof Booster Inserts |
| Material Build | Water-Repellent Polyurethane Foam with Polyester Outer Knit |
| Color Finish | Optical White (Optimized for bright summer colors, whites, and patterns) |
| Size Variations | Small (UK 10–12) | Medium (UK 14–16) | Large (UK 18–20) |
| Pack Configuration | 1 Pair (2 Pieces Total) per retail pack |
| Care Instructions | High-durability build; fully machine washable, chlorine-safe, and salt-water resilient |
| Best Used For | Manufacturing custom one-piece swimsuits, lining bikini tops, activewear sports bras, performance dancewear, and replacing collapsed lining cups in athletic swimwear |



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