Traditional comfort and value, with an anything but traditional design approach, the Sea To Summit Trek II -8° Sleeping Bags are what to grab for globe-trotting adventures on a budget. Vertical baffles over the chest section ensure the down insulation cannot migrate or shift to the outside of the bag during sleep, creating cold spots. A side block baffle construction maintains the 60/40 fill ratio, keeping more down on the top of the bag for maximum insulation.

The Trek down sleeping bag brings the comfort of a tapered-rectangular mummy shape and the versatility of a dual-zip ventilation system to wherever your travels may take you. The full-length side zipper and secondary foot box zipper allow you to increase ventilation or open the Trek completely flat like a comforter, and the quality down will keep you warm and snug on chilly nights. The broader mummy cut gives you room to move inside the bag, regardless of your sleeping position. A Regular Wide model is available for those who really appreciate the extra wiggle room on Sea to Summit's website.

Responsible Down Standard (RDS) is 100% of the down used in Sea to Summit's sleeping bags and quilts is independently certified to the Responsible Down Standard (RDS). The RDS certifies down against animal welfare requirements and tracks it from the source to the final product giving you peace of mind that the materials in this sleeping bag have been responsibly sourced.

Lightweight fabrics reduce weight and packed bulk while the two-way #5 YKK® full length side zip and separate foot zip, allows the bag to open out completely and double as a quilt. The foot zip is perfect for extra ventilation or to provide freedom of movement for your feet. The 3D side-wall baffle ensures that down can loft to the very edge of the bag, maximising insulation, while the panelled hood draws in tight when needed or lies flat for use in warmer weather. The oversized zipper draft tube uses anti-snag materials to prevent the zipper catching and the soft-touch 20D lining fabric is highly breathable yet also down proof.

Features:

• Tapered rectangular for more space and comfort than a traditional mummy bag
• ULTRA-DRY Down 650+ Loft: 85% Down Cluster • Premium Duck Down certified Responsible Down Standard (RDS) offers excellent insulation and compressibility
• Lightweight fabrics for reduced weight and bulk
• Vertical chest baffles prevent down migration caused by shoulder movement and cold spots
• Two-way full-length #5 YKK® main side zip and separate foot zipper: Allows bag to fully unzip and double as a quilt or comfortable, providing extra ventilation options
• Oversized zip draft tube with anti-snag materials to seal in warmth and keep cold out
• Large internal security pocket for phone, GPS and valuables
• 3D Side-wall baffle maximises down insulation right to the edge of the bag
• 3D Shaped hood draws in tight when needed
• Soft touch 20D lining fabric is lightweight and highly breathable, durable 30D Nylon shell
• Includes lightweight Ultra-Sil Compression Bag for compact storage
• Zip coupling: Form a snug double sleeping bag by zipping to any Sea To Summit Altitude, Journey or Venture sleeping bag