Spark -1C Long sleeping bag

The Sea to Summit Spark -1C Long is an ultralight, high-performance goose down sleeping bag specially designed for taller hikers. Ideal for cool hiking or trekking nights.

An exceptional balance of weight and packed size

The Spark -1C sleeping bag is ideal for long-distance hiking thanks to its featherweight construction and high compressibility (850 cuin). It fits easily into a corner of your backpack, even smaller-capacity packs.

Its operating temperature range makes it highly versatile. This lightweight, compact sleeping bag can be used in mid-altitude mountains in summer.

A very practical feature of the Spark -1C is its anti-snag two-way zip, making it much easier to operate without catching the sleeping bag's thin fabric.

 

Effective thermal protection

The sleeping bag has hydrophobic-treated goose down fill for excellent thermal comfort and lasting loft.

The Spark -1C has a mummy shape optimised for thermal insulation, with lengthwise baffles around the torso to maintain even down distribution as you move.

This sleeping bag uses 10D and 7D Nylon, known for being soft and breathable, encouraging effective thermal exchange to keep you warm.

The footbox is shaped to limit cold spots. A draught tube along the zip prevents heat loss.

The goose down is RDS-certified (Responsible Down Standard), sourced with respect for the environment and animal welfare. Its hydrophobic treatment is guaranteed PFC-free (hazardous perfluorinated compounds).

 

Other features

• Outer fabric (shell): ultralight, water-repellent, breathable 10D Nylon
• Inner fabric (lining): soft, breathable 7D Nylon
• Fill: 850+ Fill Power goose down with hydrophobic treatment (305 g)
• Storage sack and compression sack included