The patented designed set contains a non-latex neck seal firmly sealed between neck rings. The non-latex compound will stretch and return to shape even after multiple uses. Neck seal has large opening; ribbing lines for cutting; raised ports to stop drainage into tubing; (2) port caps and an accessory port. Large Hood contains two additional 22mm ports and measures 12 3/8” (314mm) x 11 ½” (291mm). Neck seal is single-patient, multi-use and Hood is multi-patient use.