Spark SP0, 10C / 50F, Long 15% Cotton - 4.1 oz./sq. yd. | 140 SGM the sounds of a bird

the sounds of a bird tell you—when you know the clues that show you why there’s no such thing as “just a duck”—birding will be more fun

This pull-on

12 in the gym in ‘em

Built on their incredibly durable EVA base

Rottefella’s burliest

Spark SP0, 10C / 50F, Long 15% Cotton - 4.1 oz./sq. yd. | 140 SGM the sounds of a birdThe Spark Ultralight Mummy Sleeping Bag Series spans everything from an ultralight down filled liner to a mid winter fast and light sleeping bag. Each model uses premium materials and no frills design to provide cutting edge performance for the designed end use. Ultralight does not mean ultra tight: The Spark mummy sleeping bags are snug but still have adequate girth for the performance oriented backcountry user.