The Western Mountaineering MegaLite sleeping bag is an ultralight down bag with extra room to move. A generous 64" shoulder girth and 850+ fill power goose down deliver reliable warmth to -2°C at around 680g, ideal for summer and mild 3-season use.

Despite the roomy wide mummy cut, with more shoulder and hip space and freedom of movement, it stays impressively light and highly packable. 10cm (4") of loft from premium goose down gives an excellent warmth-to-weight ratio and long-lasting loft, continuous baffles let you shift down for colder nights or balance it in milder temperatures, and an insulated draft tube and top collar keep the cold out. The 12D ExtremeLite ripstop nylon shell is ultralight, breathable and durable for its class. Choose the MegaLite for summer backpacking, bikepacking, thru-hiking and warm-weather alpine trips when you want space without extra weight.

Why you'll love it

• Wide fit – 64" shoulder girth for more space and less restriction
• Ultralight – from around 650g
• Warm to -2°C – ideal for summer and mild 3-season nights
• 850+ fill power goose down – premium insulation with continuous baffles
• Highly packable – 15 x 30cm (165cm) or 18 x 33cm (180cm and longer)

Good to know

• Loft: 10cm (4")
• Shell: 12D ripstop nylon (ExtremeLite)
• Weights: 165cm 650g; 180cm 680g; 200cm 710g
• Fill weights: 165cm 310g; 180cm 340g; 200cm 370g
• Girth (shoulder / hip / foot): 165cm 160 / 142 / 99cm; 180cm 163 / 142 / 99cm; 200cm 165 / 142 / 99cm
• Sizes in this listing: 5'6" (165cm), 6'0" (180cm), 6'6" (200cm); colour Navy
• Includes an ultralight stuff sack and a breathable mesh storage bag
• Made in the USA

Who it's for

Backpackers, bikepackers, thru-hikers and comfort-focused summer adventurers at any level who want a roomy ultralight down bag.