Updated on February 26, 2024


Created on September 1, 2021

Envo​®​ Mask

Upcoming Update

Reusable N95 mask for protection and comfort.

Tested By
  • Nelson Laboratories
Content Partners


Product Description

envo​®​ mask is a reusable respirator mask to protect against harmful particulates in industrial work environments and air pollution that can lead to serious health risks. This device is made with medical-grade materials, and its filters meet N95 standards and filter out at least 95% of airborne particulates. This product is manufactured and distributed by Sleepnet Corporation.

Target SDGs

SDG 3: Good Health and Well-Being

Market Suggested Retail Price


Target Users (Target Impact Group)

Small and Medium-sized Enterprises, Public Sector Agencies, NGOs

Distributors / Implementing Organizations

Sleepnet Corporation

Competitive Landscape

Direct competitors include BluMask.

Manufacturing/Building Method

This mask is manufactured by Sleepnet Corporation, which is located in Hampton, New Hampshire, USA.

Intellectural Property Type


User Provision Model

The product can be purchased online at the envo® mask Shop.

Distributions to Date Status

The exact number of distributions to date is unknown, but envo® mask is widely distributed worldwide, sending out 1600 to 2000 orders a day since it started in 2020.

Exhalation Valve Leakage (ml/min)

3.37 – 9.41

Exhalation Resistance (mm H20)

8.4 – 8.8

Inhalation Resistance (mm H20)

15.7 – 16.0

Filtration Efficiency (%)

97.44 – 99.08

Maximum Particle Penetration (%)

0.923 –  2.560

Corrected Initial Airflow Resistance (mm H2O)

18.0 – 21.5

Available size(s)

Standard size.


N95 Filters are available at online shop.

Indispensable equipment for function (Y / N)

No equipment required.

Maintenance or calibration required by user at time of use? (Y/N)


Material(s) used in product

Filter is made of non-woven fiber material. Facemask body and front grill are made of moldable polymers like ABS.

Power supply type: Continuous, Recharging only (V, time required, battery life), Other

Not required.

Design Specifications

envo® mask is intended to have a comfortable seal to minimize skin irritation, using vapor barriers around the nose to prevent the mask from fogging glasses. The electrostatic charged filters should allow long term storage, and be safe from damage produced by the constant action of taking the mask on and off. The one-way exhalation valve reduces temperature and moisture inside the mask. The mask chamber’s design and filter placement improve speech clarity. Headgear is designed to be easily taken on and off and allows the user to remove the mask without touching the mask or damaging filters. The product includes a storage case with replacement filters to protect the mask.

Product Schematics

Technical Support

Technical support provided by the manufacturer.

Replacement Components

Filters and other accessories are available at the shop.


It is recommended to discard the filters after every use, as they are not suitable for multi-day activities. The mask’s lifecycle depends on the usage, as it can be washed and reassembled multiple times. envo® mask offers a 90-day warranty against manufacturing defects.

Manufacturer Specified Performance Parameters

envo® mask seeks to provide a comfortable N95 mask without compromising safety, reducing PPE expenditure and waste due to disposable masks. According to the manufacturer, typical use cases experience a 40-60% reduction in overall costs.  

Vetted Performance Status

Product was approved by NIOSH in 2019, which implies that its inhalation and exhalation resistance has been evaluated in a laboratory, and it has been found to comply with all of the requirements of Title 42 CFR Part 84 for respiratory protective devices. Filters and valves were also tested by a laboratory to evaluate filtration efficacy and valve leakage respectively.


As the mask is reusable, it can be hand washed with mild soap, warm water, and a soft cloth to remove dirt and dust. Filters should be discarded after every use.

Complementary Technical Systems


Academic Research and References


Envo mask, “User Instructions“, 2021

The National Personal Protective Technology Laboratory (NPPTL), “Model Envo Mask N95- NIOSHI approval“, Centers for Disease Control and Prevention

Compliance with regulations

envo® mask obtained CDC - NIOSH approval.  

Evaluation methods

Tests were run by Nelson Laboratories, for inhalation and exhalation resistance.

Other Information


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