Sea to Summit - Trek TkI - Down sleeping bag. Fill power: 650 cuin|Down-to-feather ratio: 60/40 (down to feather)|Other material information: Ultra-Dry Down; 15D nylon|Sustainability: contains RDS certified down|Closure: side zip|Comfort rating: 5 °C|Lower limit rating: 0 °C|Extreme rating: -15 °C|Season: three seasons|Dimensions (interior): max. height Reg: 183cm; max. height Large: 193 cm|Reference size: medium size|Misc: hood with drawstring; foot zip; connectable|Season: Three seasons|Comfort rating: 5|Comfort rating grouped: Up to 5°C|Sustainability: Responsible Down Standard