Size options (1.5 Size Options) - Single - 80 x 210 cm - Single - 120 x 210 cm - Comfort Single - 160 x 210 cm - Double Hotel - 180 x 210 cm - Comfortable Double - 200 x 210 cm Key benefits and features - Skin-friendly comfort you can trust: made of washed cotton fabric with a fine washing process for a soft, breathable feel that is gentle on the skin. - Ergonomic design for everyday use: an invisible zipper at the bottom allows airflow and frees your feet, enabling ventilation and additional movement when needed. - Easy care and seasonal versatility: the liner can be cleaned or replaced without washing the entire sleeping bag, keeping your setup cleaner with less hassle. Seasonal versatility and performance - All-season flexibility: the thermal sleeping bag can be inserted into a winter sleeping bag to add warmth, while the liner itself can be used independently as a summer sleeping bag, supporting use across four seasons. Use scenarios - Winter camping or cold environments: insert the liner into a winter sleeping bag to enhance warmth and comfort during overnight trips; the liner can be washed or swapped to maintain cleanliness. - Travel, hostels, or mild-weather camping: use the liner alone as a lightweight summer sleeping bag for comfort and breathability, or pair with a heavier bag when temperatures drop. - Home and multi-location use: ideal for guest rooms, camping in backyards, or outdoor activities where a flexible, washable liner improves comfort and hygiene.