Color: Black and white grid Stay warm and comfortable outdoors with this heated sleeping bag liner. Soft, foldable, and lightweight, it provides adjustable warmth for adults through three heat levels and runs from a USB 5V 2A power source such as a power bank or car charger. Ideal for camping, travel, hiking, outdoor picnics, and emergency situations. Key benefits warmth: Three heat levels let you choose Low, Medium, or to match changing temperatures. Temperature ranges are Low 3845C, Medium 4555C, 5565C. Portable and lightweight: At about 750 g and foldable design, the liner is easy to pack and carry for multiday trips. Soft and skin friendly: Plaid velvet polyester provides a comfortable surface for sensitive skin while heating delivers soothing warmth without abrasive materials. Stable placement: Antislip back with adhesive backing helps keep the liner in place inside a sleeping bag or on other surfaces. Simple power compatibility: Designed for USB 5V 2A input to work with common power banks and car chargers. Note that a power bank is not included. Specifications Product name: heated sleeping bag liner Color: Black and white grid Fabric: Plaid velvet, polyester Back: Antislip fabric with adhesive backing Size: about 198 x 62 cm (77.95 x 24.41 inches) Net weight: about 750 g per unit Heating element: alloy fiber heating wire Temperature range: Low 3845C, Medium 4555C, 5565C Packaging size: about 13 x 13 x 33 cm (5.12 x 5.12 x 12.99 inches) Power input: USB 5V 2A (power source not included) Battery life estimates with a 10000 mAh power bank: about 5 hours, Medium about 7 hours, Low about 9 hours Included in the package 1 heated sleeping bag liner 1 instruction manual Practical use scenarios Tent camping: Place the liner inside your sleeping bag for reliable warmth on cool nights while camping. Road trips and car camping: Use with a car charger or power bank to stay warm during overnight stops or long breaks. Outdoor rest and survival: Lay the liner on a sleeping pad or ground shelter for added warmth during hikes, picnics, or emergency situations. Home or travel backup: Use as an extra layer at home or in seasonal travel where additional, portable heat is needed. Additional notes Power bank is not included. Heating requires a compatible power source with USB 5V 2A output. Color may vary slightly due to lighting and screen differences. Please allow a 12 cm difference in measurements due to manual measurement.