I no longer carry any fleece hiking. Love it at home, around town, and for that outdoors look. (I actually prefer windblock. I find it much warmer cuz it cuts the wind. Can add insulating layers as needed. By contrast my 100,200,300 fleece does not cut the wind (unless I wear a shell over it) so I'm often cold with even a slight breeze)

For layering while moving I use poly or smartwool of lighter or med weight. Otherwise, replaced my fleece tops, coats, layering with 3oz Montrail pullover 1/2 zip windshirt. traps loads of heat, and still breathes well. I repeat 3 OZ! Especially warm if I add a less breathable wind/rain shell over it. Add my cocoon style insulated pullover 1/2 zip top and bottoms for real insulation once I stop moving and to add warmth when sleeping. Probably among my best UL conversions from traditional outdoors/backpacking/camping.

My Cocoon style pullover 1/2 Zip Patagonia Micropuff synthetic insulated top is "heavy" & weighs ~12oz, my bottoms with full side zip weigh 14oz. Both are wind and water resistant & weigh FAR less than any fleece I've owned, but are also MUCH warmer - like wearing a down coat or pants. They are not as durable so I'm cautious if doing any camp work, etc. Cocoon versions at Backpackinglight.com weigh ~6-8oz ea. for pullover top & bottom depending on sizing. Not cheap but I swear by SUL synthetic insulating top/bottoms.

Highly recommended. Similarly my BPL Vapor Barrier Insulated Mitts weigh <4oz and glove liners <2 oz and are far quicker drying, water/wind resistant (& lighter) than any fleece gloves I've owned.

Same for beanie style hats.