The Climax 757 Half Mask is made of silicone.
The filters are secured to the mask with a bayonet system.
The headband and neck band are adjustable in length.
Offers very little resistance to breathing as it includes two filters in conjunction with a front "one way" valve 
Filter connection : Bayonet.
Filter (x2 fitted) : 757-N P3R.
Material : Silicone rubber.
Nominal protection factor (NPF): 50.
Weight : 159 gr.
Norm : EN 140:1999.