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Sea to Summit Spark SpIII Sleeping Bag-Regular

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NPR67,415
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Buy the Sea to Summit Spark Sp3 Sleeping Bag in Nepal for advanced warmth and ultralight trekking—perfect for demanding Himalayan expeditions and minimalist camping.

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Engineered for serious trekkers, mountaineers, and alpine adventurers, the Sea to Summit Spark Spiii Sleeping Bag ensures optimal insulation without added weight. Its design excels in high-altitude environments, multi-day treks, and cold-weather overnights, making it a top pick for those needing a compact, lightweight sleeping solution for trails or expeditions.

Trusted by lightweight backpackers, the Spark Sp3 is built to withstand challenging conditions, offering versatility from mild winter hut trips to three-season backpacking.


Key Features

  • RDS 850+ fill power Ultra-Dry premium goose down insulation for superior loft and warmth.

  • 10D nylon shell and 7D lining for featherweight durability.

  • Expedition mummy shape with extra room for layers and improved movement.

  • Full box baffle construction to minimize cold spots and maximize thermal efficiency.

  • Vertical chest baffles prevent down migration.

  • Water-repellent Ultra-Dry Down™ treatment guards against moisture and condensation.

  • YKK #3 zipper with draft tube and neck collar for warmth retention and easy venting.

  • Lightweight compression sack included for easy packing.


Sea to Summit Spark SpIII Key Points 

  • Award-winning warmth-to-weight ratio for minimalist adventurers.

  • Contoured fit provides comfort and insulation without the cramped feel of typical ultralight bags.

  • Innovative water-repellent technology for reliable warmth in variable weather.

  • Outperforms standard bags with expedition-level construction and premium RDS-certified down.

  • Favored by experts for Himalayan trekking and alpine expeditions.


Technical Specifications

  • Insulation: 850+ Fill Power ULTRA-DRY™ Premium Goose Down (RDS Certified).

  • Shell/Lining: 10D nylon (shell), 7D nylon (lining).

  • Weight: 625–690g (regular/long).

  • Comfort Temp Rating: -2°C; Lower Limit: -8°C; Extreme: -26°C.

  • Maximum User Height: 183cm (regular); up to 196cm (long).

  • Shoulder Width: 75–76.5cm; Foot Width: 44–47cm.

  • Zipper: Full-length YKK #3, dual slider.

  • Compressed Pack Size: 3.7–6.8L (varies by size).

  • Season Rating: 3-season.

  • Certifications: RDS (Responsible Down Standard), PFC-free DWR finish.

  • Color: Grey/Yellow.


User Benefits

  • Sleep comfortably in cold, variable Himalayan conditions without carrying extra weight.

  • Packs down small to optimize space in your backpack for extended multi-day treks.

  • Swift loft and warmth upon unpacking for quick campsite setup after long days.

  • Maintains insulation performance even in damp Nepal mountain weather thanks to water-repellent down.

  • Spacious mummy cut allows easy layering for high-altitude nights, maximizing safety and adaptability.

  • Reliable three-season coverage supports adventurous trekking and hut-to-hut expeditions.

  • Enjoy peace of mind with responsibly sourced materials and PFC-free finishes, supporting ethical and sustainable adventures.

Weight 0.665 kg
Dimensions 183 cm
Size

Comfort Temperature

Extreme Temperature

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