Philips Respironics DreamWear Nasal Mask Frame (Medium)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li class="showHiddenFeatureBullets"><span class="a-list-item"> Over the head air entry design. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Features bilateral air travel down both sides of the frame. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Allows for the ease of side to side sleeping. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Easy to clean and replace. </span></li><li class="showHiddenFeatureBullets"><span class="a-list-item"> Available in small， medium and large. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/21GFXLBuwhL.jpg" noproxy>