waterproof & comfortable: outer cover material is 290t nylon,which is a kind of waterproof and breathable fabric.lining material is polyester pongee.our envelop sleeping bag is filled with 400gsm elastic & hollow down alternative microfiber.the material is soft,comfortable and breathable,spring back quickly to make sleeping bag more fluffy and warm.
brand zipper: two-way zipper is easy to pull back and forth,which can be used to adjust the temperature according your demand,so the camping sleeping bag could be used in 3 seasons.(attention:if the zipper get stuck,please draw back gentlely, then go forth.)
combinable design: combining left-zip and right-zip sleeping bag together,you can make a double sleeping bag conveniently.disconnect the sleeping bag can be used as a quilt or mat.