RS Cleanroom Facemasks with Headloops. These cleanroom facemasks with head-loops are processed and packaged in a cleanroom environment to maximise particle reduction. Features:. Silicone and lint-free polyurethane loop Ultra-low lint Solvent-safe Extra-wide facemasks for maximum coverage Loop can be adjusted to ear-loop type. Applications:. Medical device Semi-conductor Microelectronics Pharmaceutical Aerospace Food processing