Trek -9C Down Sleeping Bag

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The Sea to Summit Trek -9°C Down Sleeping Bag offers comfort and reliability for camping and overnight adventures. Its semi-rectangular fit provides ample space for a cosy night’s sleep. The bag is designed for cold climates and keeps you comfortable down to -9°C .

Sea to Summit says: 

The Trek Down Sleeping Bag is the perfect option for vehicle-based travels and overnight camping. With 650+ FILL Power, this versatile and spacious bag uses an ergonomic design to offer additional warmth and comfort.

Our Verdict

The Sea to Summit Trek -9°C Down Sleeping Bag is an outstanding choice for those seeking comfort and reliability on camping trips and overnight adventures. With its semi-rectangular fit, this sleeping bag offers ample space, ensuring a cosy night’s sleep without the confinement of traditional mummy bags.

One of the standout features is its temperature rating. The bag is designed to keep you comfortable at temperatures as low as -3°C, with a comfort limit down to -9°C. This makes it suitable for various climates, providing peace of mind that you’ll stay warm even when temperatures drop.

650+ Fill Power Duck Down provides the insulation, treated with Ultra Dry Down for enhanced water resistance, a critical feature for damp conditions. The outer shell and lining are recycled polyester, offering durability and environmental consciousness.

Another highlight is the Free Flow Zip System, which allows for flexible temperature regulation and multiple configurations to suit different sleeping preferences. Whether you need to ventilate on a warmer night or seal in the warmth during colder conditions, this bag adapts to your needs.

Weighing 1401g for the regular size and 1590g for the long size, the Trek -9°C is relatively lightweight for its warmth. The generous hood, fitted draft collar, and single draft tube along the zippers contribute to excellent heat retention.

– Reviewed by Ultralight Outdoor Gear

Features

• Duck Down with Ultra Dry Down treatment for improved water  resistance in damp conditions.
• Recycled polyester offers durability and comfort for lightweight  adventures in a range of climates and conditions.
• The Free Flow Zip System offers temperature regulation and  multiple sleeping bag configurations for added freedom in the outdoors.
• The Semi Rectangular Fit features a spacious design for added  comfort and room that is best suited to car camping and  shorter adventures.

Specifications

Temperature Rating

• EN13537:2012 Comfort: -3°C | 27°F
• EN13537:2012 Comfort Limit: -9°C | 15°F

Regular Specs

• Weight: 1401g (excludes storage bags)
  
• Fill weight: 635g
  
• Fits up to: 6 ft / 185cm
• Internal Width Shoulder: 158cm
• Internal Width Waist: 149cm
• Internal Width Feet: 119cm
• Compressd Size: 20L

Long Specs

• Weight: 1590g (excludes storage bags)
  
• Fill weight: 735g
  
• Fits up to: 6 ft 6 in / 198 cm
• Internal Width Shoulder: 168cm
• Internal Width Waist: 159cm
• Internal Width Feet: 129cm
• Compressd Size: 20L

Fit

• Semi-rectangular fit: Spacious and generous, a roomy fit for car camping and the occasional overnighter.

Materials & Construction

• Insulation: 650+ FILL Power, RDS-certified, Duck Down with Ultra Dry Down treatment for improved water resistance in damp conditions
  
• Fabric: Recycled 20-Denier Polyester shell and lining.
• Zipper: Free Flow Zip System: Primary zip – full length #5 with zip-plow and two sliders.
  Secondary zip – 1/2 length #5 with zip-plow and two sliders.
  Footbox zip – #5 with two sliders.
• Baffle Construction: Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout.
• Collar: Fitted front draft collar: scalloped over the neck and oversized at the shoulders.
• Hood: Generous fitted hood with two soft touch adjustments. Fits a Sea to Summit regular pillow.
• Draft Tube: Single, synthetic-filled, draft  tube along the top of all zippers.
• Intergration: Pairs with Women’s Sea to Summit bags, and STS quilts.

Help & advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• Sea to Summit Sleeping Bag & Quilt Guide
• About Sea to Summit
• The EN13537 Standard
• All About Down