MEMBERSHIP
Earn up to 10% back in rewards. Learn more. Join Free.
LOWEST PRICE GUARANTEE
Find a better price? We’ll beat it by 5%. See our Price Match Policy.
Riding at the top of your game requires a jacket that's at the top of the food chain. The L1 Alpha Jacket doesn't just keep up - it sets the pace. This lightweight shell packs a serious punch with its 3-layer NOVA-X fabric and 20K waterproof membrane, laughing in the face of snow, sleet, and whatever else the mountain throws your way. From hot laps through the park to tours deep into the backcountry, its ergonomic fit and futuristic style will have you looking and feeling like a pro, no matter where your board takes you.
NOVA-X 3-Layer Fabric – L1's technical, waterproof, breathable, windproof, 20K/20K stretch fabric solution exclusively available in the Theorem line.
PFC-free DWR – As part of L1's commitment to improving their environmental footprint, they have entirely switched from C6 DWR containing hazardous PFC’s (per- and poly-fluorinated chemicals) to PFC-free DWR on all fabrics and styles that require a DWR coating.
20,000 mm Waterproofing / 20,000 g Breathability
Eco Yarn Lining – GRS certified 100% recycled polyester linings, manufactured from used PET bottles. Using environmentally-friendly recycling processes, it does not require petrochemical raw materials and saves natural resources reducing the burden on the environment.
Water Resistant Zip Hand and Chest Pockets
Inner Zip Pocket with Cord Exit and Cable Guide
Large Snowsafe Hand Pockets
Zip Pass Pocket on Left Sleeve
Goggle Pocket
Zip Underarm Vents
2-Way YKK® AquaGuard® Water Repellent Center Front Zip with Placket Covered
Fully Taped Seams – All seams and areas with stitch lines are heat sealed with water-repellent tape.
Stretch Sleeve Gaiter with Thumb Hole
Jacket to Pant Snap Away Powder Skirt
Shock Cord Hood and Hem Adjusters
Elastic Insert at Powder Skirt
Soft Chin and Neck Guard
Inner Storm Flap
Velcro Adjustable Cuffs
Key Clip
Breathability Rating (g) | Breathability Level | Activity Level |
0 - 10000 | Low to moderate breathability | Resort skiing & snowboarding / walking / low intensity activity |
11000 - 15000 | Moderate breathability | Resort skiing & snowboarding / hiking / moderate intensity activity |
16000 - 20000 | High breathability | Backcountry skiing & snowboarding / backpacking / moderate to high intensity activity |
21000+ | Very high breathability | Backcountry skiing & snowboarding / biking / high intensity activity |
Warmth | Description | Ideal Conditions |
Shell | Outer shell with no insulation. Pair with base layers and mid layers to fine tune the level of warmth required. | Variable |
Warm | Light insulation. Use additional base or mid layers to add warmth when temperatures drop. | 20° - 35° |
Warmer | Moderate insulation. Suitable for cold conditions. | 10° - 25° |
Warmest | Heavy insulation. Designed to keep you comfortable and protected on the coldest days. | Below 15° |