# Vanguard: Vanguard

> China swimming goggles manufacturer since 1993\. Patented co\-injection anti\-fog tech, ISO/BSCI/CE/FDA certified, 48\-hour dispatch\. Get a factory quote\.

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## Pages
- [Home](https://vanguardswimming.com/)
- [Products](https://vanguardswimming.com/products/)
- [contact us](https://vanguardswimming.com/contact-us/)
- [Sitemap](https://vanguardswimming.com/sitemap/)
- [Snorkeling](https://vanguardswimming.com/snorkeling/)

## Posts
- [How Anti\-Fog Coating Works on Swim Goggles: Chemistry and Longevity for Buyers](https://vanguardswimming.com/anti-fog-coating-swim-goggles/): The coating chemistry behind anti\-fog swim goggle lenses: how hydrophilic films stop droplet scatter, why the effect is sacrificial, what kills a coating in the supply chain, and how buyers should specify and test longevity\.
- [Freediving Fins for Dive Schools: Bulk Program and Instructor Discount Structure](https://vanguardswimming.com/freediving-fins-for-dive-schools/): How dive schools should spec a freediving fin fleet: stiffness tiers by course level, durability features that lower cost per session, per\-color MOQ math, and the four discount structures to negotiate into a bulk program\.
- [Custom Freediving Fins OEM: Blade Angle, Foot Pocket, and Graphics Options](https://vanguardswimming.com/custom-freediving-fins/): How to scope a custom freediving fin program: what can change on existing tooling, when a new mold earns its keep, and what blade, foot pocket, and graphics decisions cost in MOQ, lead time, and return risk\.
- [Closed\-Heel vs Open\-Heel Freediving Fins: Buyer's Sourcing Guide](https://vanguardswimming.com/closed-heel-vs-open-heel-freediving-fins/): How retailers should weigh closed\-heel \(full foot\) against open\-heel freediving fins: sizing and return economics, tooling and MOQ differences, channel fit, and building a two\-configuration assortment\.
- [Freediving Fins Stiffness Grades: Soft, Medium, Hard — Which Sells Best?](https://vanguardswimming.com/freediving-fins-stiffness-grades/): How retail buyers should weight a freediving fin range across soft, medium, and hard stiffness: what each grade does to the kick, how material drives the feel, which grade sells best, and how to verify flex before committing\.

## Categories
- [Product Guides](https://vanguardswimming.com/category/product-guides/)
- [Sourcing \& OEM](https://vanguardswimming.com/category/sourcing-oem/)
- [Manufacturing \& Technology](https://vanguardswimming.com/category/manufacturing-technology/)
- [Quality \& Certifications](https://vanguardswimming.com/category/quality-certifications/)

## Optional
- [Sitemap index](https://vanguardswimming.com/sitemap_index.xml)