![STS Spark Sleeping Bag](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUN4vMRs1Cp2LBX7LRgGPI_CXRXnRC8LnC6sIx-__LARp0vxXMEovPq12WfTL1lNMfN2IT-CJuYo2-ybd2Kt3JUPmJQTsiLOr8mHPG8qdPruyjMdhUZZH7m5iJYxBoYzHd0r1Hh7Zuric/s1600/STS-Spark-Sleeping-Bag_1.png)
[$420]
When packed down this teeny tiny minimal Spark sleeping bag from Sea to Summit is about the size on an apple! But don't despair it packs a punch for it's size with an amazing warmth to weight ratio, using 850+ loft Ultra-Dry Down and weighing in at 12.3oz / 348g it's temperature rating is 46 F / 8°C so more suited to summer/spring/autumn uses like adventure racing, summer cycle touring, ultra lightweight hiking and ultra lightweight alpine climbing.
![STS Spark Sleeping Bag](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRbnqnmSfUDA4qFAtSoyatGINPHiuTnzjCiBXHGhKOwAh_fsWR3iTBwnW6H6-MAhy34nUbyi6XE44fhSDyzudtTnDQ5yMras5JIlU8Kywyod4fDQO6Qz53DIysycaBuOC3N6_vD5CaE4E/s1600/STS-Spark-Sleeping-Bag_2.png)