With a zipperless, hybrid design using both down and synthetic fill, ALPS Mountaineering Fusion 40 sleeping bag's 600-fill-power down top and TechLoft Micro synthetic-fill bottom offer smart warmth.
Features
A lightweight, mild-weather bag for camping and backpacking, the quilted down top is unattached on 3 sides, allowing it to fold open for freedom or tuck in for added warmth
Water-resistant 600-fill-power down repels water and prevents the down from clumping
TechLoft Micro insulation consists of multiple-denier, staple-length fibers that have a siliconized finish for maximum insulation, warmth-to-weight ratio, loft and compactness
20-denier nylon shell and lining fabrics provide a soft, comfortable feel
Toggle system eliminates gaps when quilted down top is tucked in