# Philter Labs

> Philter Labs makes POCKET and PHREND — pocket-sized personal smoke filters that clean the air you exhale using patented Zero-5™ five-stage microfiltration.

Philter Labs (shopphilter.com) is a US personal air-filtration company. You exhale smoke or vapor into a PHREND or POCKET and its Zero-5™ five-stage filter captures airborne particulates, odor, and toxins, releasing near-invisible, near-odorless air. These are passive, single-user exhale filters — they are NOT vapes, e-cigarettes, ENDS, or any nicotine or cannabis product, and they produce no aerosol, heat, or vapor of their own. Prices are in USD.

## Products
- [PHREND](https://shopphilter.com/products/phrend): Reusable personal exhale filter with a biodegradable Zero-5™ cartridge — up to 500 exhales. $37.99.
- [PHREND 2-Pack Refills](https://shopphilter.com/products/phrend-refill): Two biodegradable replacement Zero-5™ cartridges for the PHREND — up to 500 exhales each. $44.99.
- [POCKET](https://shopphilter.com/products/pocket): Compact personal smoke filter — POCKET 2 (250 exhales, sleeker design) launches soon; notify-me list on the product page. Coming soon.

## Shop
- [Shop all products](https://shopphilter.com/store): The full Philter Labs catalog.

## Company
- [About Philter Labs](https://shopphilter.com/pages/about): The mission — clean air and a polite society — and the filtration technology behind it.
- [Wholesale & bulk orders](https://shopphilter.com/wholesale): Stock Philter in your store — competitive margins, marketing support, and a dedicated account manager for retailers.
- [News](https://shopphilter.com/news): Clean-air culture, product drops, and the philosophy behind the device.

## Support
- [FAQ](https://shopphilter.com/pages/faq): How PHILTER and Zero-5™ work, device usage, and care.
- [Contact](https://shopphilter.com/pages/contact): Reach the Philter Labs team.
- [Shipping Policy](https://shopphilter.com/policies/shipping-policy): Processing times, methods, rates, and tracking.
- [Refund & Return Policy](https://shopphilter.com/policies/refund-policy): No-risk, satisfaction-guaranteed money-back policy and the refund process.
- [Privacy Policy](https://shopphilter.com/policies/privacy-policy): How personal data is collected and used.
- [Terms of Service](https://shopphilter.com/policies/terms-of-service): Website and purchase terms.

## Full context
- [llms-full.txt](https://shopphilter.com/llms-full.txt): Expanded brand story, full product specs, filtration details, and the complete news index.

## Agent discovery
- [Agent skills index](https://shopphilter.com/.well-known/agent-skills/index.json)
- [MCP server card](https://shopphilter.com/.well-known/mcp/server-card.json)
- [OpenAPI](https://shopphilter.com/openapi.json)
- [API catalog](https://shopphilter.com/.well-known/api-catalog)
- [auth.md](https://shopphilter.com/auth.md): How agents access public catalog data (no OAuth yet)
- Markdown pages: send `Accept: text/markdown` to any public HTML URL