MSA Medium Thermoplastic Rubber Advantage 200 LS Half Mask Facepiece With Single Neckstrap - Advantage 200 LS RespiratorOffers unmatched fit and comfort with a clear blue facepiece. The thermoplastic rubber subtracts 25 of the weight and adds softness to MSA's Advantage 200 LS respirator. The patented MultiFlex System equalizes pressure on the face-seal area, while delivering exceptional stability, so the respirator will not collapse during wear.