Spark

The Spark down sleeping bag from Sea to Summit has been designed for those focused on keeping their pack as light as possible without compromising sleep quality. It features RDS-certified 850+ fill-power goose down with a non-PFAS Ultra-Dry Down treatment for superior warmth and moisture resistance. The design includes a technical hood and a draft tube along the zipper to help trap heat. A breathable 10-denier liner enhances comfort, while the 10D shell fabric, treated with a non-PFAS DWR, and water-repellent materials in the hood and footbox help block wind and moisture. The full-length zip version can also connect with a compatible Women’s Spark bag, making it a great option for couples.

Spark Down Sleeping Bag Features

• 850+ loft goose down treated with Ultra-Dry Down treatment to prevent moisture absorption
  
• 100% of the down used has been independently certified to the Responsible Down Standard (RDS)
  
• Ultralight and breathable face fabric helps with moisture regulation
• Technical hood, anatomical footbox and ergonomic mummy shape for excellent warmth-to-weight ratio
• Zipper length specific for each use case: half-length for ultralight packability on the lighter bags, and full-length for layer management cold weather on the warmer bags
• 10 denier polyester shell with a DWR (Durable Water Repellent) finish blocks wind and moisture
  
• 10 denier polyester liner provides soft next-to-skin comfort