Description

The Sea to Summit Spark 30°F / -1°C is a premium ultralight down sleeping bag built for serious backpacking and weight-conscious trekking. Designed for fast-moving adventures where every gram matters, it combines 850+ fill power responsibly sourced down with an ultra-light technical shell for maximum warmth-to-weight efficiency.

With a comfort range around -1°C, the Spark 30 is ideal for spring to autumn trekking, high summer mountain camps, and lightweight wild camping across Europe. Its tapered mummy design minimises bulk while retaining thermal efficiency, making it a strong choice for alpine routes and long-distance trails.

This is not a casual campsite bag. It is built for performance, packability and serious backcountry use.

Key Features

• Ultralight 3-season down sleeping bag
• 30°F / -1°C temperature rating
• 850+ fill power Responsible Down Standard (RDS) certified down
• Ultra-light 10D nylon shell and lining
• PFC-free water-resistant down treatment
• Technical tapered mummy construction
• YKK zip with anti-snag design
• Compact pack size for fast and light travel

Specifications

• Temperature Rating: 30°F / -1°C
• Season Rating: 3 Season
• Insulation: 850+ Fill Power Down (RDS Certified)
• Shape: Performance Mummy
• Shell Fabric: 10D Nylon
• Lining: 10D Nylon
• Occupancy: 1 Person
• Intended Use: Backpacking, Trekking, Mountain Travel

Use & Care

• Always use with an insulated sleeping mat
• Air after each trip
• Store loosely in a large storage sack
• Avoid long-term compression
• Wash using down-specific detergent when required

Good to Know

Best suited for experienced backpackers prioritising weight savings. Down insulation provides exceptional warmth-to-weight performance but requires proper moisture management in damp environments. Always follow local wild camping regulations when camping overnight.