Helmet covers are usually made out of canvas or cotton and come in many camouflage designs, for example: woodland, desert or urban, and different camouflage patterns like MARPAT, CADPAT and ACUPAT. It can also be used for UN peacekeeping missions with a UN Blue colour helmet cover. Helmet covers are generally a flat colour to stop any reflection from a metal helmet. Helmet covers are attached to the helmet in many different ways, such as a tight rubber lip which goes all the way around the helmet rim and is pulled on and peeled off, also there are versions with draw-strings and types which are attached to the helmet suspension system.