Do you open or close them when you’re wearing them?

Neither. They don’t open or close. They are a filter that allows air in when you breath but not when you breath out.

How often do the filters need to be changed?

I change mine about every 5-7 days depending how much use

Are you open or close them when you’re wearing them?

Close them to lock the filter in place

How well do these work with glasses? Fog up or no?

This mask is much better for me than the cloth masks. With normal breathing, my glasses don’t fog up. With harder breathing glasses fog a bit

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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NBDIB 4 Pack Adjustable Reusable Face Protection with 8 Carbon Filters and 8 Valves for Cycling Sport Black

Product ID: 239332337

💨8 breathing valves for optimal airflow

🛡️8 activated carbon filters for superior dust defense

🚴‍♂️4 masks for multi-sport use

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₨14419

Duties & taxes included

In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚴‍♀️ Gear up, breathe easy, and never miss a beat!

FOG FREE VISION - Integrated nose bridge minimizes fogging—perfect for glasses-wearers on the move.
CUSTOM FIT COMFORT - Adjustable neoprene fabric, nose clip & ear straps ensure a secure, anti-slip fit for all-day wear.
QUICK CHANGE FILTERS - Replace filters in 60 seconds to maintain peak performance—stay fresh, stay protected.
PRO GRADE DUST DEFENSE - Activated carbon filters block dust, pollen & large particles—breathe cleaner on every ride.
ECO FRIENDLY REUSABLE - Hand washable mask body designed for long-term use—reduce waste without compromising safety.

The NBDIB 4 Pack Adjustable Reusable Face Protection set includes 4 sport-ready masks, 8 activated carbon filters, and 8 breathing valves designed for cycling and outdoor workouts. Featuring a customizable fit with neoprene fabric, nose clip, and adjustable straps, these masks offer superior dust and pollen filtration with quick filter replacement and anti-fog technology—perfect for active professionals seeking reliable, reusable protection.

Specifications

ASIN	B08LC163QL
ASIN	B09F9SLDLZ
Age Range Description	Adult
Best Sellers Rank	#66,228 in Health & Household ( See Top 100 in Health & Household ) #18 in Cloth Face Masks
Brand Name	NBDIB
Closure Type	Elastic Strap
Color	4+8+8b Pcs
Customer Reviews	3.9 3.9 out of 5 stars (3,076)
Date First Available	September 2, 2021
Fabric Type	Adjustable_Face_Protection
Filter Class	N95
Fit Type	Adjustable
Included Components	Adjustable_Face_Protection
Item Package Quantity	1
Item Shape	Adjustable_Face_Protection
Manufacturer	NBDIB
Manufacturer	NBDIB
Material	Cotton
Number of Items	4
Part Number	NBDIB0000488
Pattern	Adjustable_Face_Protection
Product Style	Adjustable_face_protection
Reusability	Reusable
Size	1 Count (Pack of 4)
Special Features	Adjustable_Face_Protection
Theme	Sport
Unit Count	4 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

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

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