Alder MF

Alder MF – Roomy Summer Sleeping Bag

The Alder MF is a roomy summer sleeping bag made for mild nights, starry skies, and comfort without restriction. Its semi-rectangular shape gives you space to stretch out while still sealing in warmth when the temperature drops before dawn.

With a 62-inch shoulder girth and 46 inches at the foot, the Alder MF offers generous space for side sleepers or anyone who moves around while sleeping. It’s perfect for warm-weather backpacking, casual car camping, and minimalist weekend getaways.

This bag features 850+ fill power goose down for lightweight insulation and high-loft performance. The MicroLite XP™ shell adds wind resistance and water repellency while staying breathable and durable in summer conditions.

Two  zippers offer versatile use. One runs along the side, while the second wraps around the footbox. You can open the bag completely flat for use as a quilt or comforter. You can also zip it to another Alder MF or to the Summer Coupler™ to create a roomy two-person sleep system.

The Alder MF excels on warm nights where you want just enough insulation without sacrificing airflow or comfort. Whether you’re camping in the desert, relaxing at a festival, or setting up at a trailhead basecamp, this bag brings reliable comfort and flexibility.

Formerly known as the Aspen MF, nothing has changed but the name. It’s still made in the USA and crafted to Western Mountaineering’s high standards.

For warm-weather camping with space to move and options to adapt, the Alder MF is your go-to sleeping bag.