Real owners lean toward the Western Mountaineering MegaLite: 93% of 54 owners recommend it, vs 59% of 17 for the Marmot Trestles Elite Eco 20.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
A roomy cut with space to move is common ground for owners of the Western Mountaineering MegaLite and the Marmot Trestles Elite Eco 20, but the two split sharply on almost everything else. MegaLite owners describe a down bag that sleeps warmer than its 30-degree rating, down into the teens and 20s, in an ultralight package that packs small and lasts for years, with the drawbacks being a steep price, a cold spot at the feet for taller sleepers, a snag-prone zipper, and an awkward hood. Marmot owners choose theirs precisely to skip down, valuing synthetic insulation that holds up when damp, a roomy Extra Wide option, and a friendly price, while accepting that it runs colder than its rating, packs larger, and is heavier than down. Backpackers counting ounces who want premium down warmth and will pay for it lean to the MegaLite, while down-avoiders and budget-minded campers who value damp-weather insulation lean to the Marmot. The choice comes down to down versus synthetic and premium weight savings versus price.
“Its very nice and comfy”— @JBC_cat on YouTube
“My shoulder season bag is the women's marmot trestles elite eco 20°F (note the men's temp rating is different). It's great, again not ultralight being synthetic, but it packs down small for the temperature, is cozy, and not super heavy. I think it's the best for that category without going for down.”— dontoweyoupretty on Reddit
“I got a synthetic marmot trestles elite (womens), comfort rated for 21F and it was def not. I slept in 32 and was freezing so bad i had to go sleep in my car.”— Status-Show4087 on Reddit
A roomy cut with space to move is common ground for owners of the Western Mountaineering MegaLite and the Marmot Trestles Elite Eco 20, but the two split sharply on almost everything else. MegaLite owners describe a down bag that sleeps warmer than its 30-degree rating, down into the teens and 20s, in an ultralight package that packs small and lasts for years, with the drawbacks being a steep price, a cold spot at the feet for taller sleepers, a snag-prone zipper, and an awkward hood. Marmot owners choose theirs precisely to skip down, valuing synthetic insulation that holds up when damp, a roomy Extra Wide option, and a friendly price, while accepting that it runs colder than its rating, packs larger, and is heavier than down. Backpackers counting ounces who want premium down warmth and will pay for it lean to the MegaLite, while down-avoiders and budget-minded campers who value damp-weather insulation lean to the Marmot. The choice comes down to down versus synthetic and premium weight savings versus price.
Owners point the Marmot Trestles Elite Eco 20 at shoulder-season backpackers in 30F-and-up temps, and campers avoiding down and animal products.
Owners point the Western Mountaineering MegaLite at backpackers and thru-hikers wanting an ultralight down bag, and restless side sleepers needing a roomy mummy cut.
The most-cited downside of the Marmot Trestles Elite Eco 20 is runs colder than its rating; needs a liner or layers below 30F. For the Western Mountaineering MegaLite, it's expensive.