Sea to Summit Spark SpI - Long light grey/yellow

A minimum-weight mummy bag built for fast-and-light summer missions and adventure racing.

The Sea to Summit Spark SpI is a contoured mummy sleeping bag designed to maximise thermal efficiency at minimal packed size. Filled with 850+ loft ULTRA-DRY Down® (RDS-certified 90/10 premium goose down), it covers a comfort range of +9°C down to an extreme of -9°C. The long cut fits users up to 198 cm and features updated shoulder and hip room without compromising insulation efficiency.

Features

• 850+ loft ULTRA-DRY Down® insulation — RDS-certified 90/10 premium goose down

• Contoured mummy shape for efficient heat retention

• Updated sizing with extra room at shoulders and hips

• Light-gauge #3 YKK® zip

• Can double as a sleeping bag liner to boost warmth of a second bag

• Includes Ultra-Sil Nano compression sack

Technical Specifications

• Temperature rating: +9°C (comfort) / +5°C (limit) / -9°C (extreme)

• Body length: 198 cm

• Packed size: ø11 × 23 cm

• Lining: 7D Nylon

• Weight: 385 g