Durable, brushed fabric design minimizes twisting during the night. Top sides open 24″ and fold down for easy entrance and ecit. Safety Velcro tabs close the openings to keep out drafts. Square pillow hood and reinforced seams. Use liner with a sleeping bag to improve warmth by about 10 degrees or by itself as a warm-weather bag or travel sheet. Machine washable and dryable. Includes stuff sack with drawstring, barrel-lock, and handle.