A SYSTEM, DEVICE AND METHOD TO COLLECT THE REAL-TIME 3D DATA FROM THE FIRE SCENE

Provided herein is a respirator (100, 100A, 100B) with adjustable straps (210, 220) that can achieve tight-fitting on most wearers. The respirator (100, 100A, 100B) includes a mask body (110), an upper strap (210), and a lower strap (220). The mask body (110) is adapted to fit over a mouth and a nose of a wearer. The upper and lower straps (210, 220) are both detachably attached to the mask body (110) by threading through at least one upper anchor structure (231, 231A, 233) and at least one lower anchor structure (232, 232A, 234) respectively. Each of the upper strap (210) and the lower strap (220) comprises markings (240) for indicating at least one upper position on the upper strap (210) and at least one lower position on the lower strap (220). The upper position defines a first length of the upper strap (210) and the lower position defines a second length of the lower strap (220) that the respirator (100, 100A, 100B) fits to the wearer with increased consistency when the upper and lower straps (210, 220) are stretched over the wearer's head.