A fleece jacket is a versatile midlayer for hiking, camping and everyday use. The full zipper makes it easy to release heat, while the fabric provides breathable warmth and continues to insulate better than many natural fibers when damp.

Compare fleece weight, knit structure, breathability, wind resistance, zipper design and pocket placement. Lightweight grid fleece is efficient for active layering; dense, plush fleece is warmer but bulkier. If it will sit under a shell, lower bulk and smooth layering are useful.

Grid fleece uses raised channels to trap warmth while allowing moisture and excess heat to escape. High-pile fleece traps more air for warmth but can be bulky. Neither is automatically better—the right structure depends on activity intensity and weather.