<br><b>Is it one or all 4 ? </b> <br> its for all 4 <br><b>Do these untie or are they just stretchy/elastic? </b> <br>they are very stretchy. <br><b>Will these fit a newborn? </b> <br> Yes suitable for 0-6 years <br><b>Has anyone tried washing these? I just bought some and wanted to wash them before my baby girl wears them but didnt want to ruin them.</b> <br>Yep. My little girl sucked on one (teething) then left it in the street. After I finally found it I washed it and let it air dry. No problems at all. <br><b>Do these leave marks on your babies head? </b> <br>They don't , there very strechy <br><b>Are they easy for the babies to pull off? I want my daughter to be able to take them off when she gets uncomfortable.</b> <br>yes they are easy for a child to pull off, my 6 month old pulls hers off. <br><b>Washed by hand or machine wash</b> <br>Hand Wash