The protective hoods are designed for use together with Sundström half masks and full face masks with filters or SR 307 compressed air attachment, and with the SR 90 Airline. The hood is made of chemicals-resistant materials and provides protection against splashing and dripping of most solvents and acids in relatively low concentrations. However, the material may be affected by extended contact with certain solvents in liquid form. The hood is extra roomy, so that both a safety helmet and ear protectors can be worn under the hood, if necessary. The SR 346 hood is extended so that it covers the top part of the user’s body. The visor is treated to prevent misting. The hood can be machine-washed about 10 times – without spin-drying – at a maximum of +40 °C.