Similar to the S-655 , the 3M S-657 Hood uses a double shroud design for its respiratory seal; wearers can select on their seal design based on personal preference
The wearer should tuck the inner shroud into a shirt or protective coverall , which allows excess air to be channelled over the body for additional comfort
The 3M S-657 Hood offers head , face , neck and shoulder coverage as well as providing eye and face protection to EN166 - liquid splash and low energy impact (grade F) the same classification for impact resistance as safety spectacles! Manufactured using a general purpose , fabric , the S-657 is a cost effective , practical powered air solution
When used in conjunction with 3M Powered and Supplied Air Systems the S-657 offers an assigned protection factor (APF) of:
Jupiter APF= 40
Dustmaster APF= 10
TR-300 APF = 40
V-500 APF= 40Assigned Protection Factor (APF) as detailed in HSE HSG53
