Mad River 40 Sleeping Bag (4°C)If it aint broke, dont fix it. The Mad River is a packable down mummy bag for the backpacking traditionalist who just wants a good nights sleep after a good day's slog. 650 fill power duck down means this bag packs small yet still lofts up tall, so you can comfortably recharge after a long day on the trail. Chemical free ExpeDry tech delivers forever performance without forever chemicals, permanently helping down dry quickly and maintain loft when