Sea to Summit Trek Series
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Sea to Summit Trek Series - Lightweight Down Sleeping Bag

Sea to Summit

Regular price $297.00 Sale price $369.95

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Combining traditional comfort and value with modern design, this bag is perfect for globe-trotting adventurers on a budget.

Sea to Summit has now created a women's specific version of the Trek Series. You can learn all about the new Journey Series here.

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.

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.

Completing the thoughtful design features of this classic down bag, there is a large internal security pocket, perfect for keeping valuables close or batteries warm.

Specifications

Size Variation

Type User Height Weight Fill Weight Chest Hip Foot
TK I - Regular Up to 183cm 760g 350g 152cm 146cm 102cm
TK I - Long Up to 198cm 850g 400g 162cm 157cm 108cm
TK I - Regular Wide Up to 183cm 920g 450g 172cm 161cm 122cm
TK II - Regular Up to 183cm 980g 500g 152cm 146cm 102cm
TK II - Long Up to 198cm 1080g 560g 162cm 157cm 108cm
TK II - Regular Wide Up to 183cm 1160g 600g 172cm 161cm 122cm
TK III - Regular Up to 183cm 1190g 700g 152cm 146cm 102cm
TK III - Long Up to 198cm 1310g 780g 162cm 157cm 108cm

Temperature Rating

Type Comfort Lower Limit Extreme
TK I
5℃
0℃
-15℃
TK II
-1℃
-8℃
-25℃
TK III
-5℃
-11℃
-30℃

TK I

  • Tapered rectangular for more space and comfort than a traditional mummy bag
  • RDS 650+ Loft ULTRA-DRY Down offers excellent insulation and compressibility
  • Lightweight fabrics for reduced weight and bulk
  • Vertical chest baffles prevent down migration and cold spots
  • Two-way #5 YKK side and separate foot zip allows bag to double as a quilt and provides extra ventilation options
  • Oversized zip draft tube with anti-snag materials
  • Large internal security pocket
  • 3D hood draws in tight when needed
  • Trek Tk1 has baffled top and stitch through base construction
  • Soft touch 20D lining fabric is lightweight and highly breathable, durable 30D Nylon shell
  • Includes Ultra-Sil Compression Bag for compact storage
  • This bag is designed to pair with another
  • Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: DUCK DOWN (Min. 85% Down), Stuffsack: 100% Nylon excluding Trims

Regular

  • Recommended User Height: 183cm
  • Bag Weight: 760g
  • Fill Weight: 350g
  • Internal Chest Circumference: 152cm
  • Internal Hip Circumference: 146cm
  • Internal Foot Circumference: 102cm

Regular Wide

  • Recommended User Height: 198cm
  • Bag Weight: 850g
  • Fill Weight: 400g
  • Internal Chest Circumference: 162cm
  • Internal Hip Circumference: 157cm
  • Internal Foot Circumference: 108cm

Long

  • Recommended User Height: 183cm
  • Bag Weight: 920g
  • Fill Weight: 450g
  • Internal Chest Circumference: 172cm
  • Internal Hip Circumference: 161cm
  • Internal Foot Circumference: 122cm

TK II

  • Tapered rectangular for more space and comfort than a traditional mummy bag
  • RDS 650+ Loft ULTRA-DRY Down offers excellent insulation and compressibility
  • Lightweight fabrics for reduced weight and bulk
  • Vertical chest baffles prevent down migration and cold spots
  • Two-way #5 YKK side and separate foot zip allows the bag to double as a quilt and provides extra ventilation options
  • Oversized zip draft tube with anti-snag materials
  • Large internal security pocket
  • 3D side-wall baffle maximises down insulation right to the edge of the bag
  • 3D hood draws in tight when needed
  • Soft touch 20D lining fabric is lightweight and highly breathable, durable 30D Nylon shell
  • Includes Ultra-Sil Compression Bag for compact storage
  • This bag is designed to pair with another
  • Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: DUCK DOWN (Min. 85% Down), Stuffsack: 100% Nylon excluding Trims

Regular

  • Recommended User Height: 183cm
  • Bag Weight: 980g
  • Fill Weight: 500g
  • Internal Chest Circumference: 152cm
  • Internal Hip Circumference: 146cm
  • Internal Foot Circumference: 102cm

Regular Wide

  • Recommended User Height: 198cm
  • Bag Weight: 1080g
  • Fill Weight: 560g
  • Internal Chest Circumference: 162cm
  • Internal Hip Circumference: 157cm
  • Internal Foot Circumference: 108cm

Long

  • Recommended User Height: 183cm
  • Bag Weight: 1160g
  • Fill Weight: 600g
  • Internal Chest Circumference: 172cm
  • Internal Hip Circumference: 161cm
  • Internal Foot Circumference: 122cm

TK III

  • Tapered rectangular for more space and comfort than a traditional mummy bag
  • RDS 650+ Loft ULTRA-DRY Down offers excellent insulation and compressibility
  • Lightweight fabrics for reduced weight and bulk
  • Vertical chest baffles prevent down migration and cold spots
  • Two-way #5 YKK side and separate foot zip allows bag to double as a quilt and provides extra ventilation options
  • Oversized zip draft tube with anti-snag materials
  • Large internal security pocket
  • 3D side-wall baffle maximises down insulation right to the edge of the bag
  • 3D hood draws in tight when needed
  • Trek Tk3 has additional neck collar draft tube to seal and trap in all your warmth
  • Soft touch 20D lining fabric is lightweight and highly breathable, durable 30D Nylon shell
  • Includes Ultra-Sil Compression Bag for compact storage
  • This bag is designed to pair with another
  • Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: DUCK DOWN (Min. 85% Down), Stuffsack: 100% Nylon excluding Trims

Regular

  • Recommended User Height: 183cm
  • Bag Weight: 1190g
  • Fill Weight: 700g
  • Internal Chest Circumference: 152cm
  • Internal Hip Circumference: 146cm
  • Internal Foot Circumference: 102cm

Long

  • Recommended User Height: 198cm
  • Bag Weight: 1310g
  • Fill Weight: 780g
  • Internal Chest Circumference: 162cm
  • Internal Hip Circumference: 157cm
  • Internal Foot Circumference: 108cm
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