tldr; European budget champion with 800FP down at half the price of competitors. EN tested to 23F/-5C comfort. Weighs 850g (1lb 14oz) for regular size. Incredible value for casual backpacking. Not cottage-quilt light but punches above its weight class.
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Best praise vs top criticism for Decathlon Forclaz Trek MT900
“Looks nice! Not a fan of the color and the fabric has an usually texture, but it’s probably going to be alright. I know people who survived torrential rains in cheap Decathlon jackets. Btw, they seem to be on fire recently. They’re also prepping a 880g 50l UL backpack. https://www.decathlon.co.uk/p/ultra-light-50l-trekking-backpack-mt900-ul/_/R-p-350653”
“One tip about the boxers. I own 2 pairs and they are quite thin, after about 200km the material from the crotch will get thinner due to friction (will be left with a sort of mesh) and at about 300-400 you will get holes in them, this is the downside of thin merino underwear, worth considering if looking for longevity. Apart from this, really loved them, takes a good amoynt of time to ride up. The elastic band feels a bit too rigid for me. There's the mt900 which are thicker but i hate them, ride up really easy, and too short; if these 2 aren't a problem for you, they are definitelly better in everything else but personally can't wear them for long distances.”
179 Reddit opinions analyzed • Last updated 2/24/2026