Nemo Aria Hybrid 30 Sleeping Bag nylon Spoon Shape: NEMOs all new sleeping bag profile shape allows for your knees to naturally bend and shift throughout the night. As opposed to a traditional mummy shaped bag, the Spoon Shape is wide in the shoulders, tapers down to the hips, and then gently flares back out around the knees. PILLOW POCKET: With sleeve opening and contrast edge binding, trap extra clothes inside the integrated Pillow Pocket to create a comfy headrest. Watch Pockets: Small pockets in the hood allows you to keep your alarm or chapstick close at hand Toggle Fastener: Fastening toggles seamlessly mate the Muse Duvet and Cover to prevent shifting Drawstring Hood Opening: Spoon Shape and Coda series bags feature a drawstring hood for optimizing the size and shape of the opening.