Sea to Summit Treeline Sleeping Bag

20.1% OFF

$239.00$289.00 inc GST.

Our Treeline™ Sleeping Bag is a budget down bag that is ideal for three season use when you’re confident the temperature won’t drop far below freezing.

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While we’ve given this design a little extra room around the shoulders and hips for freedom of movement, the relaxed mummy shape still provides efficient warmth and heat retention when you need it.

Filled with 400g of compressible and lofty 600+ down, the Treeline™ will keep you warm and comfortable. The two-way YKK #5 side zip with anti-snag fabric provides easy access and ventilation for warmer weather.

Utilising our unique internal cord tunnel in the hood and neck draft tube, the Treeline™’s exterior finish is kept neat and free of additional loose fabric. The internal chest pocket is a great spot for keeping valuables secure, or batteries warm.

The 50D Nylon shell and lining fabrics provide long-term durability while still offering good compressibility.

Light enough for backpacking adventures, this sleeping bag can withstand the rigours of sharing your outdoor adventures with kids or dogs.

  • Relaxed mummy shape with fitted hood for a little more wriggle space while still providing efficient warmth
  • Super-compressible and lofty RDS 600+ Down
  • 50D Nylon shell and lining fabric provide extra durability while still offering good compressibility
  • Internal chest pocket is perfect for keeping valuables secure, or batteries warm
  • Draft tube prevents heat loss through the zipper
  • Internal draw cords in the hood and neck draft tube for streamlined exterior finish
  • Two-way YKK #5 side zip with anti-snag system for easy access and ventilation options
  • Supplied with stuff sack and storage cell for compact storage
  • This bag is designed to pair with another
  • EN13537 Temperature Rating Comfort: 2°C | 36°F
  • EN13537 Temperature Rating Lower Limit: -3°C | 27°F
  • EN13537 Temperature Rating Extreme: -19°C | -2°F
  • Dimensions:
    • Regular: 212cm x 83cm
    • Long: 227cm x 89cm
  • Fill Weight:
    • Regular: 400 Grams
    • Long: 450 Grams
  • Internal Chest Circumference:
    • Regular: 155cm
    • Long: 164.5cm
  • Internal Hip Circumference:
    • Regular: 136cm
    • Long: 143cm
  • Recommended User Height:
    • Regular: Up to 183cm
    • Long: Up to 198cm
  • Weight:
    • Regular: 970g
    • Long: 1120g

Additional information

Weight N/A
Dimensions N/A

Regular, Long


Sea to Summit

Temperature Rating Comfort

2°C, 36°F

Temperature Rating Lower Limit

-3°C, 27°F

Temperature Rating Extreme

-19°C, -2°F

Fill Weight

400g, 450g


970g, 1120g


Sea to Summit

Sea to Summit is an innovative design and product development company that engineers a wide range of intuitively simple products that help make time in the outdoors fun, efficient and comfortable. From our West Australian base, Sea to Summit has grown into an award-winning global brand sold in more than 60 countries. Significant growth and international recognition has strengthened our original ethos ‘to equip and inspire’ and it continues to drive our research and development of the best materials and production methods. It inspires new product innovations that keep us at the forefront of bringing lighter, better made, better performing gear to outdoor enthusiasts around the world.


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