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【loop and hoop fastener 】: the extra loop and hoop fastener help the zipper in place and the top of the zipper escaping from the fighting heat.

【popular choice】: rectangular sleeping bag is a popular choice for car campus.The campground with a rectangular sleeping bag, and this one is a family and car campaign for a warm and roomy option.

【any posi】: in an envelope sleeping bag, you can sleep in almost any position you want.A rectangular bag offers more freedom of movement and a variety of sleep positions.

【multifunctional zipper 】: the envelope sleeping bag has a zipper down two sides, running the length and the width of the bag.If you feel too warm or complete unzip your sleeping bag and use it as a big blanket.

【lightweight & portable 】: these super light sleeping bag weighs about 0.75kg, easy storage and transportation with carrying bag. You can hang it on your backpack and carry it easily. Zipper with double sliders for your convenience.