When choosing between a shell and a fleece jacket, consider these key factors:
Warmth
A fantastic insulator, fleece traps air between its fibres, creating a layer of warmth. Thicker fleece jackets offer superior warmth but come at the cost of bulkiness. For maximum warmth in extremely cold environments, fleece excels as a mid-layer under a windproof shell.
Shell jackets are built for high performance in challenging conditions, particularly wet and windy weather. Typically waterproof and windproof, these jackets lack insulation, aiming to stay lightweight and breathable for high-intensity activities.
Mobility
Fleece jackets tend to offer less flexibility compared to shell jackets, especially soft shells. Insulated fleece jackets usually feature an outer layer made of ripstop fabric which maintains tightness to prevent stretching and tearing. Additionally, the insulation within these jackets, while effective for warmth, can restrict movement as they are primarily designed for warmth during periods of low activity.
In contrast, shell jackets tend to be better for moving around. They're usually lighter and designed with cuts that allow for more freedom of movement. Soft shell jackets, especially, are made with stretchy materials so you can move freely during activities.
Breathability
Breathability is key for both fleece and shell jackets. Why? Because sweat is the enemy in cold weather. When you sweat, it evaporates and steals heat from your body, making you dangerously cold. On top of this, wet clothes lose insulating ability significantly, increasing the risk of hypothermia.
Top-notch fleece jackets boast breathable exteriors that prevent sweat build-up while keeping precious down filling contained. Look for jackets with materials like Thermal Pro®, a Polartec® fabric, that is highly durable, fast drying and breathable.
Shell jackets are equally critical when it comes to breathability. By nature, you'll likely be more active when wearing a shell, generating more heat. A highly breathable shell ensures you stay comfortable and focused on the task at hand.