




F1 Lt
Free shipping over $100. Free return shipping except oversized items.
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F1 Lt
24
415 North Lake Boulevard
415 North Lake Boulevard
Tahoe City CA 96145
United States
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Shipping & Returns
- Items ship in 3 days or less.
- We do not ship anywhere outside of the contiguous US.
- 10 day return policy. Free return shipping.
- Items must be unused, and in their original packaging with tags to be eligible for return or exchange.
- There are no returns on sale items.
Click here for our Shipping and Return Policies
- Best Use Ultralight Backcountry
- Last 100mm
- Claimed Weight (Single Boot) 990g (27.0)
- Sole Scarpa Vibram® UFO RS
Features
Combining ultralight elements of our Alien race boots with a more versatile, backcountry-oriented design, the all-new F1 LT is our lightest weight alpine touring boot, optimized for high-mileage missions, ambitious traverses, and technical ski mountaineering descents.
- Carbon Grilamid LFT shell & cuff delivers incredible power to weight ratio.
- 3D Lambda Torsion Frame increases lateral stability and downhill performance.
- Speed Lock ski walk mechanism is strong, precise and easy to use.
- Boa Fit System for a fast and secure fit.
- Waterproof gaiter system provides total snow protection.
- New Zeppa increases ramp angle by 3.5 degrees.
- Cuff: Carbon Grilamid LFT.
- Ski/Walk Mode: Speed Lock LT.
- Closure: 1 Buckle + Boa Fit System.
- Binding System: TLT.
- Optimized Touring Pivot: 1mm.
Technical Specs
| Best Use | Ultralight Backcountry |
|---|---|
| Gender | Unisex |
| Claimed Weight (Single Boot) | 990g (27.0) |
| Last | 100mm |
| Boot Flex | 100 |
| Shell Design | 3-piece |
| Shell Material | Carbon Grilamid® LFT |
| Buckles | 1 |
| Sole | Scarpa Vibram® UFO RS |
| Binding Compatibility | Tech |
| Liner | Intuition® Cross Fit Tour LT |
| Forward Lean | 9° | 11° | 13° +/- 2° |
| Warranty | 1 Year Limited |
Shipping & Returns
We offer free shipping on orders over $100. Most orders ship within 3 days or less.
Returns are accepted within 10 days of purchase, or within 10 days of receiving your online order. Items must be unused, with original tags attached and in original packaging.
Sale items, climbing and mountaineering gear, avalanche safety equipment, and demo gear are final sale and not eligible for return.
Need help? Email info@alpenglowsports.com or call (530) 583-6917.

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AI FAQs
AI generated FAQs about the F1 Lt
Are these boots narrow, wide, or standard in the forefoot?
These boots have a medium 100 mm last in the forefoot. This medium-width fit is offered across sizes 24 through 31.
Can I adjust how snug these boots fit around my ankle and calf?
These boots use one buckle plus a BOA Fit System for a fast, secure fit. The closure setup lets you secure the boot for touring and skiing.
Do these boots have good ankle support, or will my feet roll around?
The 3D Lambda Torsion Frame increases lateral stability and downhill performance. The carbon Grilamid LFT cuff is built to deliver a high power-to-weight ratio for technical descents.
What kind of binding system do these boots use?
These boots use the TLT binding system and are compatible with Tech bindings. They are built for ultralight backcountry touring and technical ski mountaineering use.
Will water and snow get inside these boots when I'm skiing?
These boots use a waterproof gaiter system that provides total snow protection. The gaiter is built to help keep snow out during backcountry touring and technical ski mountaineering.
Are these boots made for beginners, advanced skiers, or somewhere in between?
These boots are optimized for ambitious traverses, high-mileage missions, and technical ski mountaineering descents. Their ultralight 990 g weight in size 27.0 and carbon Grilamid LFT construction prioritize efficient backcountry travel with downhill capability.
Will these boots support aggressive skiing, or are they better for casual runs?
These boots are optimized for technical ski mountaineering descents, with a 3D Lambda Torsion Frame that increases lateral stability and downhill performance. They are suited to ambitious traverses and high-mileage backcountry missions rather than being purpose-built for casual resort runs.
















