The Sierra Designs Youth Frontcountry Bed is a zipperless sleeping bag that your young adventurer will love. Enter via a large opening in the top ? the oversized, integrated comforter seals the opening so they can sleep comfortably and naturally on their back, side or stomach. The oval opening is designed to intuitively adjust in width to prevent cold drafts, yet it won?t restrict their natural sleeping position.Versatile Integrated Comforter: Wraps naturally to your preferred sleeping position and allows you to easily adjust to varying temperatures. Self-Sealing Foot Vent: Zipperless vent self seals and can be operated from the inside using only your feet to easily adjust to varying temperatures. Insulated Hand/Arm Pockets: Provides insulation under your arms when comforter is used outside the bag. Zipperless Design: No additional hardware, cords or Velcro to get in the way. Catenary Shaped Opening: Opening is smaller than the bag width so when you push out, the walls push in, to seal out drafts. Fully insulated bottom.