Ultralight and super-compact with 850+ ULTRA-DRY Down
The Spark 18F is an ultralight down bag that packs down super-small for fast-and-light shoulder-season trips. The Spark uses premium materials, including ULTRA-DRY Down 850+ Loft Loft, and no-frills design to provide cutting-edge performance for backpacking, bikepacking, and travel. Ultralight does not mean ultra-tight: The Spark sleeping bags are snug but still have adequate girth for the performance-oriented backcountry user.
• 10D shell and 7D liner materials help to achieve the incredible lightweight and compact packed size
• Uses a full box baffle construction to accommodate extra down and reduce cold spots
• Expedition mummy bag sizing provides extra space for layered clothing or extra wiggle room
• Vertical baffles in chest optimize position of down and prevent it moving during use
• Zippered draft tube, hood draft collar, and front neck draft collar to prevent heat loss
• Full side zip with two sliders provides easy access and ventilation options
• Updated sizing provides extra room for both shoulders and hips while maintaining insulation efficiency
• Includes lightweight Ultra-Sil™ compression bag and storage cell

























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