The personal protective equipment (PPE) is required to meet the accepted standards and to ensure the comfort to the employees. The innovative HPE offers communications built in, with ear muffs having inset radios and/or electronics that automatically analyze external sounds before transmitting them to the ear. Bluetooth can also be built into HPE, offering wireless communication and entertainment. 3M's 8300 Comfort Series cup-shaped respirators are developed specifically for comfort. Its features include M-shaped nose clips to make them easier to fit and more comfortable and super-soft cushioned inner linings and soft waffle edges. The advances in valve technology reduces heat and moisture build-up, so that respirators stay comfortable, even in hot and humid conditions, while modern filter materials also help users breathe more easily. Marigold's plant in Portugal can knit a glove or sleeve capable of safeguarding hands and arms of people handling not even razor sharp metal sheets, but also chemical attacks.