Does this protect from secondhand smoke?

I very much doubt it. I bought them for my husband who has very bad hay fever and asthma, but they don't help much with that, so probably not.

How do I clean these? Or are they disposable?

Thank you for your enquiry. The nose filters cannot be cleaned, they are disposable.

Will the germs go in through your mouth instead

If you breath through your mouth the germs will go in.

Where do yo get the spare filters?

I think they are disposable, so use them once and dispose of them

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O2 Nose Filters with 3M Filtration Technology for Allergy Relief, Dust, Pollution - Medium - Pack of 10 with Travel Case

Product ID: 148296542

Details

Brand
Protego O2
Item dimensions L x W x H
28 x 71 x 170
UPC
854082008023

⏳12-hour continuous wear

👜Compact travel case included

🛡️99% particulate filtration

291437Fr

Duties & taxes included

In stock

Sold byAmazon CongoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Congo.

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Description

🛡️ Stay ahead of pollution—breathe smart, live smarter!

BREATHE PURE LIVE FREELY - 3M electrostatic tech blocks 99% of PM2.5 pollutants for your ultimate urban armor.
ANYWHERE ANYTIME PROTECTION - Perfect for city commutes, flights, hospitals, and outdoor pollen seasons—your invisible shield.
AWARD WINNING ALLERGY RELIEF - Endorsed by Allergy UK, trusted by professionals who demand proven performance.
TRAVEL READY FAMILY FRIENDLY - Includes a sleek travel case and multiple sizes, safe for sensitive noses and on-the-go lifestyles.
ALL DAY COMFORT ZERO DISTRACTION - Ultra-light, discreet design ensures you stay protected without sacrificing style or speech.

O2 Nose Filters combine 3M’s cutting-edge electrostatic filtration technology with a sleek, lightweight in-nose design to block 99% of harmful airborne particles down to PM2.5. Designed for up to 12 hours of comfortable wear, these award-winning filters provide discreet, all-day protection against pollution, allergens, and bacteria. Ideal for urban professionals navigating public transport, travel, and outdoor environments, the pack of 10 includes a convenient travel case and multiple sizes to ensure a perfect fit for sensitive users.

Specifications

ASIN	B07FMFRLLQ
ASIN	B07FMFRLLQ
Best Sellers Rank	107,973 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 711 in Allergy & Asthma Relief Products
Brand Name	Protego O2
Customer Reviews	3.9 3.9 out of 5 stars (1,084)
Customer reviews	3.9 3.9 out of 5 stars (1,084)
Guaranteed software updates until	unknown
Is discontinued by manufacturer	No
Item Dimensions	28 x 71 x 170 millimetres
Item Weight	1 Grams
Manufacturer	Protego LLC
Manufacturer	Protego LLC
Manufacturer Part Number	O2MED10
Manufacturer reference	O2MED10
Product Dimensions	2.8 x 7.1 x 17 cm; 1 g
UPC	854082008023

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291437Fr

Duties & taxes included

In stock

Sold byAmazon CongoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Congo.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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