The best synthetic fibre jackets are warm and waterproof, making them an ideal alternative to down jackets.
Although synthetic insulation is slightly less efficient than down in terms of warmth-to-weight ratio, it offers superior moisture resistance and breathability, as well as better value for money and greater practicality. Our equipment store stocks both types of jackets; however, when undertaking demanding outdoor activities — such as high-altitude mountaineering, ski mountaineering, or hiking in wet weather and long-distance backpacking — we generally opt for synthetic jackets, as their consistent performance is better suited to complex outdoor environments.
Best Men’s Synthetic Jacket
Best Men’s Synthetic Jacket: Arc’teryx Atom Hoodie
Best Budget Men’s Synthetic Jacket: Cotopaxi Capa Hybrid Insulated Hoodie
Best Men’s Insulated S主题0ynthetic Jacket: The North Face Casaval Hybrid Hoodie
Best Men’s Synthetic Jackets
1. Arc’teryx Atom Hoody ($300)
Weight: 12.5 oz (men’s), 11.3 oz (women’s).
Insulation: Coreloft Compact (60 g).
Pros: Offers a perfect balance of warmth, flexibility and comfort.
Cons: Breathability could be improved.
Arc’teryx produces some of the finest jackets and shell jackets available, and the Atom Hoody (formerly known as the Atom LT Hoody) is perhaps their most iconic model. This synthetic jacket perfectly meets all the essentials: it is lightweight, warm and comfortable to wear, fully functional—including an adjustable, insulated hood and stretch-knit cuffs—and stylishly designed. Unlike Patagonia’s Nano-Air (which features softer shell and lining fabrics), the Atom is more durable and resistant to wear and tear. Furthermore, it offers a close-fitting, articulated cut that enhances freedom of movement, making it suitable for use as both an outer layer and a mid-layer.
We wore the Atom on a variety of outdoor activities, from hiking and cycling to cross-country skiing, so how did it perform? The Atom isn’t as breathable as jackets such as The North Face Casaval Hybrid, but its Coreloft Compact insulation and stretch fleece panels still perform well during exercise. On the other hand, whilst its lightness and packability cannot match the down jackets mentioned in this article, we still take it with us without hesitation for most outdoor activities. Most importantly, we love its versatility: the Atom performs just as well as the best of the bunch, whilst also being one of the most suitable jackets on this list for everyday wear.
Read more: Arc’teryx Atom Hooded Jacket Review (Men’s)
The best value synthetic jacket
3. Men’s Cotopaxi Capa Hybrid Insulated Hoodie and Women’s Capa Hoodie ($185)
Weight: 1 lb 8 oz (available in both men’s and women’s sizes)
Insulation: PrimaLoft Gold PURE (40 g)
Pros: The hybrid construction effectively balances breathability and warmth; eye-catching colourways and a slim fit.
Cons: Slightly lacking in warmth; cheaper alternatives are available on the market.
Headquartered in Salt Lake City, Cotopaxi has won over a loyal following with its eco-friendly ethos and bold, distinctive aesthetic, and the Capa Hybrid is the perfect embodiment of this philosophy. Crafted from recycled fabrics and recycled insulation, its signature colour-blocking and refined cut make it equally suited to hiking on remote mountain trails as it is to strolling through bustling city streets. The ‘hybrid’ design stems from its ingenious construction: 40g of insulation wraps around the torso to provide warmth to the core, whilst knitted sleeves and side panels enhance flexibility and breathability during movement. One of our testers even went paragliding in the Capa Hybrid last autumn and was impressed by the warmth it provided at an altitude of around 1,000 feet (approximately 300 metres). Furthermore, the jacket features numerous thoughtful details, such as a soft lining, convenient thumb loops, a slim yet flexible fit, and a stylish, snug-fitting hood.
Like many of the Cotopaxi base layers we’ve used, the Capa Hybrid is excellent for those seeking a jacket that handles both everyday wear and outdoor activities with ease. Its main drawback is, as the name suggests: as the sleeves and side panels lack insulation, it isn’t the best choice for warmth when temperatures drop. For bitterly cold weather, we would opt for a jacket with thicker insulation (60g or more). However, our tester in Tennessee found the Capa Hybrid comfortable whilst walking in temperatures around 40°F, and it served as a mid-layer without any discomfort during cold-weather hikes. Price is also a factor to consider – budget-conscious consumers might prefer REI’s Co-op Trailmade Insulated Hoody, which is cheaper yet features a thicker 80g insulation layer (we are currently reviewing this product). All in all, the Capa Hybrid remains a comfortable, stylish and well-designed jacket that, when paired with the right layers, can handle a wide range of weather conditions.
In an autumnal woodland, a woman zips up her insulated jacket.
The Cotopaxi Capa Hybrid Insulated is an excellent hybrid jacket that combines breathability with warmth | Image credit: Chris Carter
Best Men’s Synthetic Insulated Sports Jacket
4. The North Face Summit Series Casaval Hybrid Hoodie ($260)
Weight: Men’s 1 lb 0.6 oz, Women’s 14.8 oz.
Filling: Ventrix (60 g + 40 g).
Pros: First-class breathability and durability.
Cons: Slightly heavy; the breathable design sacrifices some warmth.
When comparing synthetic and down insulation, active-wear insulation still performs exceptionally well during high-intensity activities, and The North Face’s Summit Series Casaval Hybrid Hoodie is one of our favourite examples. The design concept is familiar—a 60g Ventrix insulation panel on the front (40g in the hood), with highly breathable sweatshirt-style fabric under the arms and at the hem—but the craftsmanship is truly impressive. During recent testing in the Canadian Rockies, the Casaval demonstrated impressive versatility: it withstood the chill of the pre-dawn hours whilst remaining breathable enough to keep our testers comfortable during fast-paced movement in environments with drastic temperature fluctuations. The blend of 40-denier and 75-denier fabrics gives it one of the most durable constructions in its class, whilst the hood’s single-drawcord adjustment stays secure even in strong alpine winds. From backcountry skiing to trail running and summer ridge climbing, it is one of the best ‘move fast, stay dry’ mid-layers we’ve ever worn. It’s also our go-to synthetic mid-layer for fast-paced adventures on the North Cascades Highline.
Hybrid mid-layers naturally sacrifice some warmth for breathability, and the Casaval is no exception—our testers often needed to layer a shell over it when pausing in the cold wind, and found the jacket less suitable for lounging around camp. Weighing just over a pound, the men’s version is on the heavier side; some might prefer a model with more pockets or a lighter weight. Although it features a PFC-free DWR water-repellent finish that can withstand light rain, it will get soaked in persistent downpours (which is when you’ll need a shell jacket). However, its breathability is truly outstanding—our testers repeatedly remarked that they even forgot they were wearing a mid-layer—and its durability, well-fitting cut and excellent value for money all make the Casaval Hybrid a reliable companion for a full day of high-intensity activity. It isn’t a one-size-fits-all mid-layer, but for active mountain travel, it is undoubtedly the best choice.
