Spark SPI

Using 850 loft goose down treated with the amazing moisture repelling Ultra Dry Down, a micro weight 10D shell and 15D lining, the Spark is an ultra light bag with several key uses. Its balance of size, weight, and warmth make it an excellent summer sleeping bag, especially for cycle touring and ultra light hiking. Its size and temperature rating allow for use as a booster bag, slipping inside another sleeping bag to add warmth. The protection of Ultra Dry Down makes the Spark ideal for summer alpine use and adventure racing, where heavy weight is not tolerated and where until now down has not been a viable option.