Details: Brand - LAZY BEAR Fill Material - Cotton Closure Type - Zipper Outer Material - Polyester Fabric Type - Polyester Features & details ADVANCED MATERIALS- This sleeping bags is durable，the highest grade of 100% polyester fiber is used as the surface material,and hollow cotton is used as the filler to ensure light weight,durability and easy to carry,it can help you get rid of the hard work,Hike and a hard day,bring you a relaxing warm sleep. GET FREEDOM WITH SPECIAL SIZES- Measures 37.4W x 86.6 H in Perfectly fits an adult, and enough space for kids. Two-way zipper with “zipper guard” . Separated zipper at the bottom can also make your feet come out through the wind at a warm night . You can even fully open the sleeping bags then use as a blanket. GREAT FOR ALL SEASONS - Rated temperature 5(℃)--25(℃), which allows sleeper warm even at 40(℉). Comfort temperature is 17(℃)--24(℃). Perfect for backpacking, camping and hiking even using at home. Certainly the best sleeping bag for adults to adventures. WATERPROOF AND MORE COMFORTABLE SPECIAL DESIGN-sleeping bags bottom facecloth layer thickening, so that your feet in the cold winter no longer cold, we found the best balance between waterproof, breathable and warmth so that outdoor camping more comfortable, more desirable.