Is this bag warm enough for winter?

It carries 1,100 g of synthetic fill, which is a serious amount, but no EN/ISO temperature rating is published. Treat it as a cold-weather bag for most campers and add a liner for deep winter.

How does it compare with a real down bag?

Real down gives more warmth per gram and packs smaller. This bag is cheaper to make, handles damp better and is easier to clean, but it is bulkier in a pack.

It opens to about 195 x 80 cm (76.7 x 31.5 in), which is roomy at the shoulders for most adults. Check your height against the 195 cm length before buying.

Does the fill shift around?

Baffle construction separates the fill into channels, which keeps the fake down from clumping at the foot or sides. Shake it out after unpacking to loft it.

Use a front-loading machine on a gentle cycle with a mild detergent, then tumble dry low with clean balls to break up clumps. Avoid top-loaders with an agitator, which can tear the 20D shell.