Hyfin Vent 10-0042 Chest Seal Twin Pack for Wounds – Pocket Size FREE SHIPPING 3-channel pressure relief ventsTwo Chest Seals for the treatment of entry/exit or multiple penetrating woundsAdvanced adhesive gel for superior adhesion, even to sweaty or hairy chestsRed-Tip Technology single step, peel and apply application that also allows for burping the wound if necessary