Features & details USED FOR 4 SEASONS: The sleeping bags can be used for all seasons. They are designed for 32~59 Degrees Fahrenheit. We adopt high-density polyester as surface material and hollow cotton as filler. The sleeping bag is so soft and comfortable to help you get rid of tiring days of hiking, traveling, riding DESIGN: Separated zipper at the bottom can help ventilate and free your feet. The hood with adjustable drawstring keeps your head warm even in extreme conditions. Built-in pocket can storage small things like cell phone, hair bands. Our sleeping bags are designed to provide much comfort and ease after a whole day of outdoor activities MATERIAL: Outer cover high-quality polyester fabric, waterproof and breathable; lining material: 190T polyester pongee; filling material: 100% hollow cotton SIZE&EASY TO CARRY: 86.6in x 29.5in. The sleep bags can be wiped clean or machine washed to make it versatile and convenient, equipped with a bag for easy storage and carrying UPGRADE ZIPPER SYSTEM: This convenient double-sided zipper allows two sleeping bags to be zipped together as a double sleeping bag