Mammut Alnasca IV Low LTH - Women's
Pickup available at spry
Usually ready in 1 hour
Low-cut, flexible shoes for confident footing during approaches, hikes and via ferrata routes. The FLEXTRON propulsion plate provides stable, stiff support for precise edging on technical terrain. An EVA foam midsole provides enhanced cushioning and shock absorption for added comfort. And the Vibram XS TREK EVO outsole with climbing zone offers reliable grip - even when wet. Durable Mastrotto suede leather provides a secure fit and protection in rough terrain. With optimized lacing for additional support, the Alnasca IV Low LTH shoes let you tackle varied terrain with confidence.
Features
Features
Specifications
Specifications
Shipping & Delivery
Shipping & Delivery
- Free shipping within Canada on orders $100+*
- $20 shipping on orders under $100
- $45 express shipping available
Most orders are processed and shipped the same day, or the next business day for weekend orders and orders placed after carrier pickup. You’ll receive a tracking number once your order has shipped.
*Oversized sale items (like skis, ski boots & poles), as well as dangerous goods are not eligible for free shipping.
Returns & Exchanges
Returns & Exchanges
We accept returns on full-price items within 30 days of delivery, provided the product is unused, in original condition, with tags and packaging. Sale items, climbing and safety equipment, fuel and food are final sale and not eligible for return (view full exceptions). A return authorization (RA) number is required by contacting us.
Customers are responsible for return shipping costs.
Exchanges are considered on a case-by-case basis and are subject to product availability.
How to measure
Standing on a level floor, measure your foot from the heel to the tip of your longest toe. Measure both feet and select size based on the larger foot, if different.

Men's Shoes Size Guide
| inches | US | UK | EU | MONDO (mm) |
|---|---|---|---|---|
| 9.7 | 7.5 | 6.5 | 40 | 250 (2.5) |
| 9.9 | 8 | 7 | 40 ⅔ | 255 (2.5) |
| 10.1 | 8.5 | 7.5 | 41 ⅓ | 260 (2.5) |
| 10.3 | 9 | 8 | 42 | 265 (2.5) |
| 10.4 | 9.5 | 8.5 | 42 ⅔ | 270 (2.5) |
| 10.6 | 10 | 9 | 43 ⅓ | 275 (2.5) |
| 10.8 | 10.5 | 9.5 | 44 | 280 (2.5) |
| 10.9 | 11 | 10 | 44 ⅔ | 285 (2.5) |
| 11.1 | 11.5 | 10.5 | 45 ⅓ | 290 (2.5) |
| 11.3 | 12 | 11 | 46 | 295 (2.5) |
| 11.5 | 12.5 | 11.5 | 46 ⅔ | 300 (2.5) |
| 11.7 | 13 | 12 | 47 ⅓ | 305 (2.5) |
| 11.8 | 13.5 | 12.5 | 48 | 310 (2.5) |
| 12 | 14 | 13 | 48 ⅔ | 315 (2.5) |
| 12.2 | 14.5 | 13.5 | 49 ⅓ | 320 (2.5) |
Women's Shoes Size Guide
| inches | US | UK | EU | MONDO (mm) |
|---|---|---|---|---|
| 8.5 | 5.0 | 3.5 | 36 | 220 (2.0) |
| 8.8 | 5.5 | 4.0 | 36 ⅔ | 225 (2.0) |
| 8.9 | 6.0 | 4.5 | 37 ⅓ | 230 (2.0) |
| 9.1 | 6.5 | 5.0 | 38 | 235 (2.0) |
| 9.3 | 7.0 | 5.5 | 38 ⅔ | 240 (2.0) |
| 9.4 | 7.5 | 6.0 | 39 ⅓ | 245 (2.0) |
| 9.5 | 8.0 | 6.5 | 40 | 250 (2.0) |
| 9.7 | 8.5 | 7.0 | 40 ⅔ | 255 (2.0) |
| 9.9 | 9.0 | 7.5 | 41 ⅓ | 260 (2.0) |
| 10 | 9.5 | 8.0 | 42 | 265 (2.0) |
| 10.2 | 10 | 8.5 | 42 ⅔ | 270 (2.0) |
| 10.3 | 10.5 | 9.0 | 43 ⅓ | 275 (2.0 |
| 10.5 | 11.0 | 9.5 | 44 | 280 (2.5) |
| 10.7 | 11.5 | 10.0 | 44 ⅔ | 285 (2.5) |
| 10.9 | 12.0 | 10.5 | 45 ⅓ | 290 (2.5) |
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