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Sea to Summit

Spark Ultralight -1 Women's Down Sleeping Bag

Lightweight down female-specific mummy-shaped bag

Down Filled Water Resistant Lightweight

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Average weight 584g (Regular), 639g (Long)

Compression 5 Litres (Regular), 8 Litres (Long)

Fill weight 375g (Regular), 430g (Long)

Fill ULTRA-DRY Goose Down 850+ Loft, RDS certified

Fits to 170cm (Regular), 185cm (Long)

Foot width 46cm (Regular), 51cm (Long)

Inner 10D nylon with a non-PFC DWR finish

Outer 10D nylon

Shoulder width 71cm (Regular), 76cm (Long)

Temp rating minus 1°C comfort rating woman / minus 7°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Features

• Women's Mummy Fit: Fitted cut with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight. Wider at the hips and narrower at the shoulders for a better fit and heat retention for women.
• bluesign®-approved 10D nylon shell and lining fabric offers breathability, protection and effective temperature regulation for premium comfort in the outdoors; PFC-free DWR (durable water repellent) treatment keeps the hood and footbox highly water resistant
• 850+ Fill Power, RDS-certified, Goose Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Half-length #5 zip with anti-snag zip plow and two sliders
• Vertical chest baffles, horizontal baffles in the lower half and base, box wall baffles in the top half and sewn-through quilted construction lower half
• Technical fitted hood with soft touch adjustment, extra deep for cosy-like feel
• Standard front draft collar
• Single, down-filled, draft tube along the top of all zips
• QuiltLock System and drawcord footbox enables quilts to be secured to Sea to Summit sleeping bags for added functionality and freedom
• Comes with an Ultra-Sil compression bag and a storage cell
• Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate wiggle room for the performance-oriented, backcountry user

Sea to Summit

Trek -1 Women's Down Sleeping Bag

Versatile and spacious bag with ULTRA-DRY Duck Down perfect for vehicle-based travels and overnight camping

Smart Buy Down Filled Insulated Water Resistant

Select options

Scales

Packability

Ultra Compact

Compact

Mid Size

Warmth

Summer

Multi-season

Alpine

Weight

Ultralight

Lightweight

Midweight

Product Specifications

Average weight 1239g (Regular), 1418g (Long)

Compression 18 Litres (Regular), 20 Litres (Long)

Fill weight 520g (Regular), 610g (Long)

Fill ULTRA-DRY Duck Down 650+ Loft, RDS certified

Fits to 170cm (Regular), 185cm (Long)

Foot width 60cm (Regular), 65.5cm (Long)

Inner 20D recycled polyester with a non-PFC DWR finish

Outer 20D recycled polyester

Shoulder width 72.5cm (Regular), 77.5cm (Long)

Temp rating minus 1°C comfort rating woman / minus 11°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022

Features

• Women's-specific fit: Narrower at the shoulders, wider between the hips and knees. Regardless of the position you sleep in (figure-four, on your side or on your stomach), this shape provides a significantly higher level of comfort by giving you the room to move without compressing the insulation.
• Women's sleeping bags have additional insulation compared to unisex bags, positioned using different body mapping for thermal performance exactly where it is needed
• Sustainable construction with 100% recycled bluesign®-approved 20D polyester shell and lining, a PFC-free water-repellent coating and RDS down
• 650+ Fill Power, RDS-certified, 85% Down Cluster Premium Duck Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Free Flow Zip System for reliable, snag-free operation, to provide superior ventilation and allow the bag to be used as a comforter/quilt:
  • Primary zip: full-length #5 zip with zip-plow and two sliders
  • Secondary zip: half-length #5 zip with zip-plow and two sliders
  • Foot box zip: #5 with two sliders
  • Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout
  • Generous fitted hood with two soft touch adjustments; fits a Sea to Summit regular pillow
  • Fitted front draft collar: scalloped over the neck and oversized at the shoulders
  • Single, synthetic-filled, draft tube along the top of all zips
  • Internal pocket for phone / GPS / valuables
  • QuiltLock System allows Sea to Summit quilts to be locked into place over the top of the Trek, giving you modular and versatile sleeping bag
  • Form a snug double sleeping bag by zipping to any unisex Sea to Summit sleeping bags
  • Includes lightweight Ultra-Sil compression bag and storage cell

Spark Ultralight -1 Women's Down Sleeping Bag

Trek -1 Women's Down Sleeping Bag