Performance Fabrics
Certified 4-way stretch Nylon/Spandex, Italian Carvico knits, chlorine-proof polyester, and UV 50+ UPF protective textiles.
50–100 PcsLow MOQ per design style
UV 50+ / GRSChlorine resistant & eco knits
4-Point QCHydro & seam tension tested
DDP ShippingSeamless USA & global export
Professional Swimwear Factory
Custom Swimwear Manufacturers for Emerging Brands & Global Retailers
Seam Apparel is a premier USA swimwear manufacturer specializing in high-end swimsuit engineering, custom bikini production, and full-service private label manufacturing. Whether you are launching a boutique resort collection, expanding an activewear line, or scaling wholesale inventory, we bring 10+ years of garment engineering expertise directly to your production line.
Our cut-and-sew operations accommodate low minimum order quantities (MOQ starting at 50–100 pieces per style) while maintaining industrial-scale production capabilities. We oversee every technical milestone — from CAD pattern grading and specialized stretch-stitching to custom branding and certified hygienic packaging.
Equipped with state-of-the-art flatlock sewing machinery and four-needle six-thread feed-off-the-arm machines, our technical craftsmen guarantee seam durability, maximum four-way elasticity, and flawless fit accuracy across all sizing runs.
Factory Standards
Why International Buyers Trust Our Swimwear Production
Built to solve the critical challenges facing apparel importers, distributors, and direct-to-consumer fashion brands.
Flexible Low MOQs
Test new market drops with minimum runs starting at 50–100 pieces per style without sacrificing bulk factory pricing.
Private Labeling
Turnkey brand integration: custom woven tags, heat-seal care labels, branded hygienic liners, and retail eco-bags.
Strict On-Time Delivery
Locked production slots with continuous milestone updates from lab dips and pre-production samples to final export freight.
Comprehensive Capabilities
End-To-End Swimwear Manufacturing Services
From technical raw material sourcing to precise digital artwork application and retail-ready packaging.
Bespoke Cut & Sew
Bikinis & Two-Piece Sets
Triangle tops, bandeau, high-waist bottoms, and seamless push-up bikinis engineered for perfect support.
Structured Apparel
One-Piece & Monokinis
Contour-flattering cutouts, padded corsetry, athletic swimsuits, and plunge necklines with reinforced lining.
Vibrant Graphics
Sublimation & Printing
Deep-penetration digital sublimation printing resistant to saltwater degradation, fading, and intense UV exposure.
Water Sports
Performance Rashguards
UPF 50+ protective rash guards, surf suits, and athletic swim shorts with quick-dry moisture management.
Full Branding
Private Label Packages
Heat-transfer size tags, custom branded hardware, silicone hygienic stickers, and custom printed zipper mailers.
Sustainable Fashion
Eco-Friendly Fabrics
GRS-certified GRS recycled nylon (REPREVE®) and ocean plastic regenerated knits tailored for green brands.
Rigorous Quality Control
Engineering Swimwear Built For Durability & Fit
Swimwear requires higher engineering precision than standard apparel. Exposure to sun, saltwater, chlorine, and body stretch places intense strain on fabric tension and thread strength. We execute rigorous testing at every manufacturing stage:
- Fabric Elasticity & Recovery Test: Verifying stretch retention after 50+ wear cycles.
- Colorfastness Inspection: Ensuring artwork resists chlorine bleach, salt water, and UV fading.
- Anti-Bacterial & Hygienic Linings: Premium breathable double-layer lining installed in all intimate areas.
- Seam Tension & Flatlock Stitching: Reinforced multi-needle seams to eliminate bursting under pressure.
- Pre-Shrinkage Treatment: Heat-setting processes to guarantee consistent sizing after washing.
Full-Package OEM / ODM Production Schedule
We work directly with your tech packs, sketches, or physical reference samples. Our turn-key workflow ensures full visibility throughout the production pipeline.
Tech Pack & CAD Mockup: 3–5 Business Days
Fit Sample & Lab Dip Approval: 12–18 Business Days
Bulk Production Run: 20–30 Business Days
Cartons ship directly to your warehouse, Amazon FBA center, or fulfillment hub with door-to-door tracked freight and complete export customs clearance paperwork.
Structured Workflow
Our 6-Stage Swimwear Production Process
Transparent, systematic, and repeatable quality control from raw yarn to final carton delivery.
01
Specification & Tech Pack
We review your artwork, target fabric GSM, size breakdown, design specifications, and cost parameters.
02
Material Sourcing & Lab Dips
Color matching via Pantone TCX codes, fabric weight selection, and custom dye lot lab dip sign-offs.
03
Pattern Making & Prototyping
Digital pattern grading, proto sample stitching, and real-body fit adjustments prior to bulk cutting.
04
Precision Cutting & Stitching
Automated fabric laying, clean blade cutting, and flatlock tension stitching by senior technicians.
05
Decoration & Branding
Sublimation printing, rubberized heat-transfer logos, custom metal hardware, and woven tags.
06
Inspection & Tracked Shipping
100% garment inspection, hygienic sticker placement, barcoded poly bagging, and DDP export freight.
Export Knowledge Base
Frequently Asked Questions By Apparel Buyers
Find fast, authoritative answers regarding custom swimwear manufacturing lead times, minimum order requirements, material selections, and international shipping policies.
Have specific design files or custom tech pack requirements ready? Contact our engineering team for immediate technical consultation.
Factory Hotline: (323) 925-2859
Our minimum order quantity starts from 50 to 100 pieces per style/colorway. This flexible MOQ enables independent designers, boutique lines, and fast-growing fashion labels to launch curated collections without excessive inventory capital investment.
We work with premium 4-way stretch knits including Nylon/Spandex (Elastane), high-durability Polyester blends, Italian Carvico fabrics, UV 50+ UPF protective textiles, chlorine-resistant yarns, and GRS-certified sustainable recycled fabrics such as REPREVE®.
Yes. We offer turnkey private labeling solutions: tagless heat-seal care instructions, woven neck labels, custom metal hardware/zipper pulls, branded hygienic liner stickers, custom hangtags, and custom printed eco-friendly poly bags.
Sampling and fit prototyping typically take 12 to 18 business days. Once tech packs, size grading, and physical samples are approved, bulk production requires 20 to 30 business days depending on artwork complexity and total order volume.
Yes. Our garment factory handles women's bikinis, high-waist swimsuits, one-piece monokinis, plus-size swimwear, men's boardshorts, kids swim trunks, and protective athletic rashguards within integrated specialized production lines.
Yes. We deliver to clients across the USA, Canada, UK, Europe, Australia, and worldwide via reliable express air freight and ocean freight logistics with full export documentation and customs clearance (DDP / FOB options available).
Start Your Collection Today
Scale Your Brand With America's Trusted Swimwear Manufacturer
Share your sketches, tech packs, or reference samples with our production specialists in Charlotte and Los Angeles. Receive tailored fabric options, precise cost breakdowns, and a locked delivery timeline.