The Microlite 500 Square Sleeping Bag is soft and cosy for comfy evenings outside. Square shaped and packed with features, it is ideal for outdoor overnight adventures this season. Padded Insulation - Microfibre filling provides excellent heat retention, a synthetic alternative to down 2 Season - warm nights, summer, indoor use Comfort temperature - The comfort temperature for this sleeping bag is 10°C/50 degrees F Limit temperature - The Limit temperature of this sleeping bag is 5°C/41 degrees F Envelope Shape - Envelope shaped bags are essentially rectangular, offering you more space to move around in your sleep Two Way Zip - A two-way zip is useful for easy opening when ventilation is required. Zips can be full length or just half way. Inner Pockets - An inner pocket to keep.