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Sea to Summit Trailhead TH II -1°C Synthetic Sleeping Bag - Regular Wide

Sea to Summit

Sale price $229.00 Regular price $249.00

Tax included.

The perfect feature-packed, value oriented synthetic bag for weekend warriors and new campers, Sea to Summit's Trailhead is no slouch when it comes to performance. It’s tapered rectangular shape provides more space and comfort than a traditional mummy bag while the full-length side and foot zip allows the bag to be opened out and used as a quilt. A second zip slider in the footbox provides extra ventilation and versatile temperature adjustment. Our unique WaveLoft™ construction uses thick layers of insulation looped together to gain extra loft and trap pockets of warm air, providing increased warmth in colder conditions. The baffle construction also eliminates the frustration of getting tangled in loose lining as all lining fabrics are attached to the shell fabric.

Waveloft Construction

WaveLoft™ is a unique construction technology designed to maximize loft and minimalize insulation weight. Instead of conventional flat layers of insulation (sewn flat on top of each other) or shingle layers (sewn in diagonally overlapping layers), WaveLoft™ creates curved layers which expand out from the shell to trap the greatest amount of air possible at a lower overall weight than existing synthetic insulation constructions.


  • Tapered rectangular shape for more space and comfort than a traditional mummy bag
  • Full length #5 YKK zip allows bag to open out flat and be used as a quilt
  • Second zip slider in footbox for versatile ventilation
  • WaveLoft™ construction for extra warmth and loft
  • Lining fabrics attached to shell prevents tangles
  • Oversized zip draft tubes with anti-snag
  • 30D DWR Nylon shell and 20D Nylon lining are lightweight and very compressible fabrics
  • Includes a stuff sack for compact storage


 Insulation Polyester using Wavelock construction
Sleeping Bag Weight Regular Wide: 1220 g 
Length  Regular - left or right zip Long: left zip
Season Rating Summer / Spring / Autumn
EN Temperature Rating Comfort: 5°C Lower Limit: -1°C Extreme: -16°C
Suggested Use Travel, Camping, Backpacking
Compressed Volume 15L