Layering 101: fleece, synthetic, or down?
Three midlayers, three jobs. How to pick the right one for your climate — and when the cheap answer is the right answer.
Every insulation debate collapses into one question: what happens when it gets wet? Answer that for your climate and the fleece-versus-synthetic-versus-down decision mostly makes itself.
Fleece: the workhorse that shrugs off moisture
Fleece insulates while damp, breathes hard while you move, and survives a decade of washing machines. It's the right midlayer for aerobic days — hiking uphill, cool-morning runs, damp coastal weather. Its cost is bulk: warmth-for-weight, it can't touch down, and it does nothing against wind without a shell over it.
It's also the category where pre-owned is easiest to recommend: fleece hides wear better than any other garment, which is why a barely-used Los Gatos at a third off new is the quiet best deal in the catalog.
Synthetic fill: the do-everything default
Synthetic insulated jackets like Cotopaxi's Teca Cálido split the difference: warmer than fleece for the weight, far more forgiving than down when soaked, and cheap enough to treat as an everyday jacket rather than an heirloom. If you own one midlayer for three-season use — rainy commutes, camp evenings, ball games — make it synthetic.
Down: maximum warmth, minimum weight, one condition
Nothing matches down's warmth-to-weight — a Fuego packs to a grapefruit and outheats jackets twice its bulk. The condition: keep it dry. Wet down clumps and quits. Down is the pick for cold-and-dry climates, alpine starts, and anywhere ounces matter in a pack.
It's also where comparison shopping pays best, because down carries the highest list prices and the deepest clearances — the men's Fuego below is a $295 jacket at $118 while the women's colorway holds full price. Same jacket, same fill; timing is the whole difference.
The two-line summary
Sweating or soaked → fleece. One jacket for everything → synthetic. Cold, dry, and counting ounces → down. And whichever you pick, check the pre-owned shelf and the deals tab first — insulation is the category where patience is worth real money.
As always: listing prices show the date we last hand-checked them, and Jicsaw may earn a commission when you buy through our links — never at your expense.