Cotton Sleeping Bag Series (Mini Envelope Style) Product Introduction Core Selling Points ✅ Multiple specifications available: Standard/XL size optional, compact storage without occupying space, flexible unfolding/splicing use ✅ Skin-friendly & warm: Class B skin-friendly material with imitation silk cotton filling, temperature adaptation covers the full range of 15~-3℃ ✅ Exquisite details: Two-way zipper + Velcro + high-density temperature woven label for worry-free outdoor use Basic Parameters Style & Size • Standard style (Dark Shadow Blue/Jungle Green): Weight 680g/700G, storage size, unfolding size • XL style (Jungle Green): Weight 850G, storage size, unfolding size Material • Basic version: Outer fabric (water-repellent nylon), inner fabric (polyester pongee), filling (imitation silk cotton, polyester fiber) • Advanced version: Outer/inner fabric are both 20D 380T polyester taffeta, filling with imitation silk cotton Temperature Adaptation Guide Temperature Range Body Sensation & Usage Suggestions Comfort range (≥15℃) Relaxed body feeling, ideal for daily outdoor/home use Transition range (8~15℃) Body curls up but heat balance is maintained, no trembling risk Extreme range (-3~8℃) Only for emergency/professional use, cautious for cold-sensitive people