I just received the 280. I’ve also had the 260 and sold it. The 280 is basically the 260 but with less body mapping and a full front zipper. The heavy 280 weight fleece goes the entire length of the back, unlike the 210 and 260 which use a much lighter (probably 210 or 220 weight) non berber fleece on the back panel. The 280 uses that lighter material only on the sides and the wrist cuffs, which don’t have thumb holes. I really like the hood and cuffs so far. Sizing is pretty consistent within Kuiu’s system- it layers well under the same size Guide and Axis jacket but would have to be the only midlayer under those softshells.
Packability seems to be almost the same as the 260, although I don’t have one on hand to compare it to. I’m planning on using this as a midlayer for still hunting under rain gear. I think for highly active hunting it would be too warm a piece in all but the coldest conditions.
I sized up one from Kuiu’s size chart recommendation because the forearms were so tight on the 260. For reference, I’m 5’9” 175 with 40” chest 32” waist and I needed a Large