Price is for 15 packets. Each packet has 3 pieces of KN95 (9513) respirators. 
 
The 3M™ Particulate Respirator 9513 is a new disposable KN95 respirator launched by 3M.
 
Made from 3M’s proprietary filter media, 3M™ Advanced Electrostatic Media, filters dust and other particles, while allowing for easy breathing.
 
The filter media filters at least 95% of airborne particulates such as dirt, dust, sand, vehicle exhaust particle, PM 2.5 and allergens when used as instructed. 
 
Product Features:
3M™ Advanced Electrostatic Media Filter Technology
Disposable KN95 respirator
Filters at least 95% of airborne particulates
Soft & breathable materials for added comfort
3D Design, Designed to seal to the face when used as instructed