The Montane Phase Lite Gore-Tex Jacket is a minimalist, high-performance shell designed for fast-moving mountain pursuits. Whether you’re trail running in the Highlands, scrambling in the Lakes, or bikepacking through unpredictable weather, this jacket delivers reliable waterproof protection in a lightweight, breathable package. In this detailed review, we’ll explore its design, materials, fit, performance, and real-world usability to help you decide if it’s the right shell for your next adventure.
Design and Materials
The Montane Phase Lite Gore-Tex Jacket is built around GORE-TEX Active fabric, a 3-layer membrane engineered for high-output activities where breathability is as important as waterproofing. The face fabric is a 13-denier nylon ripstop, which keeps weight down while offering decent abrasion resistance for its category. The jacket is fully seam-taped and features a DWR (Durable Water Repellent) finish to shed light rain and spray.
Montane’s design ethos leans toward simplicity and function, and the Phase Lite reflects that. The jacket is stripped of unnecessary bulk, with a clean silhouette and minimal branding. It’s available in several muted colours, making it suitable for both trail and town use.
The build quality is excellent. Stitching is precise, zips are smooth, and the overall finish feels premium despite the jacket’s ultralight credentials.
Fit and Comfort
The Phase Lite is cut with Montane’s Active Mountain fit, which is trim but not restrictive. It’s designed to layer over a base or mid-layer without excess fabric flapping in the wind. The articulated sleeves and dropped hem enhance mobility and coverage, especially during dynamic movement like climbing or running.
The adjustable hood is helmet-compatible and features a stiffened peak for visibility in wet conditions. It cinches down securely without obstructing peripheral vision. The cuffs are elasticated and low-profile, and the hem includes a drawcord for sealing out drafts.
In real-world use, the jacket feels comfortable and unobtrusive. It moves with you rather than against you, and the lightweight fabric doesn’t cling or chafe during extended wear.
Waterproofing and Breathability
The GORE-TEX Active membrane offers 28,000mm hydrostatic head waterproofing and RET < 6 breathability rating, placing it among the most breathable waterproof fabrics available. This makes the Phase Lite ideal for high-output activities like trail running, fastpacking, or alpine scrambling.
In heavy rain, the jacket holds up well. Water beads off the surface, and the seam-sealed construction prevents ingress even during prolonged exposure. The minimalist design means fewer seams and zips to fail, enhancing long-term reliability.
Breathability is where the Phase Lite truly shines. The GORE-TEX Active fabric allows moisture vapour to escape efficiently, reducing the clammy feeling common in traditional waterproof shells. This is especially noticeable during uphill efforts or humid conditions.
Features and Storage
The Phase Lite keeps features to a minimum, focusing on essentials:
- YKK Aquaguard front zip with internal storm flap
- Single chest pocket with water-resistant zip
- Adjustable hood with stiffened peak
- Elasticated cuffs and drawcord hem
The chest pocket is large enough for a phone, map, or energy bar, and doubles as a stuff sack for packing the jacket down. There are no hand pockets, which helps reduce weight and bulk but may be a drawback for casual use.
The lack of pit zips or venting is mitigated by the fabric’s breathability, though some users may miss the option for manual airflow during intense efforts.
Weight and Packability
Weighing just 250g (size M), the Montane Phase Lite Gore-Tex Jacket is one of the lightest fully waterproof jackets in Montane’s range. It packs down to the size of a grapefruit, making it easy to stow in a running vest, bikepacking bag, or daypack.
This level of packability makes it ideal for fast-and-light missions where every gram counts. Whether you’re racing the weather or carrying emergency kit, the Phase Lite won’t weigh you down.
Use Cases and Versatility
The Montane Phase Lite excels in:
- Trail running: Lightweight, breathable, and race-legal for most ultra events.
- Fastpacking: Packs small, performs well in mixed conditions.
- Bikepacking: Helmet-compatible hood and trim fit work well on the bike.
- Alpine scrambling: Articulated fit and waterproofing support technical movement.
- Emergency shell: Ideal for unpredictable UK weather or summit conditions.
Its minimalist design also makes it suitable for urban use, though the lack of hand pockets may limit casual appeal.
Comparisons and Alternatives
Here’s how the Phase Lite stacks up against similar ultralight shells:
| Jacket Model | Weight | Waterproofing | Breathability | Price Range | Key Features |
|---|---|---|---|---|---|
| Montane Phase Lite | 250g | GORE-TEX Active | RET < 6 | £180–£220 | Chest pocket, helmet hood, ultralight |
| Rab Zenith Jacket | 270g | Pertex Shield Pro | RET < 10 | £200–£240 | Pit zips, hand pockets, alpine fit |
| Arc’teryx Norvan LT Hoody | 210g | GORE-TEX Shakedry | RET < 3 | £280–£320 | Minimalist, ultra-breathable, fragile |
| Patagonia Storm Racer | 198g | H2No Performance | RET < 8 | £250–£300 | Dual zip, trail running focus |
The Phase Lite offers a strong balance of breathability, waterproofing, and durability at a competitive price. It’s not the absolute lightest, but it’s more robust and versatile than many ultralight race shells.
Pros and Cons Summary
Pros:
- Excellent breathability with GORE-TEX Active
- Lightweight and highly packable
- Durable construction and premium finish
- Helmet-compatible hood with stiffened peak
- Articulated fit for dynamic movement
Cons:
- No hand pockets
- No pit zips or manual venting
- Not designed for deep winter or heavy layering
Final Verdict
The Montane Phase Lite Gore-Tex Jacket is a top-tier choice for fast-moving outdoor pursuits where weight, breathability, and waterproofing matter most. It’s ideal for trail runners, fastpackers, and minimalist adventurers who need reliable protection without excess bulk.
While it’s not loaded with features, its performance-focused design and premium materials make it a standout shell for UK conditions and beyond. If you’re building a lightweight kit for mixed terrain and unpredictable weather, the Phase Lite deserves serious consideration.
