Force 8 Half-Mask with Press To Check P3 Filters The Force8™ twin cartridge half mask with Typhoon™ valve offers superior low breathing resistance and a 4-point suspension harness with quick release buckles. The mask is made with a durable thermoplastic rubber offering a superior fit to most face shapes. The mask accepts the full range of low profile Force8™ filters giving the Force8™ the flexibility to be used for many applications.