Mammut Taiss Light Mid GTX - Men's
Pickup available at spry
Usually ready in 1 hour
Welcome to the new generation of mountaineering boots. Weighing in at just 550 grams, this is the lightest crampon-compatible mountaineering boot on the market. In alpine terrain, the focus is lightness, durability and performance. The Taiss Light Mid GTX brings these features together with an unrivalled array of materials and technology. Without compromising on dampening, the thickness of the Vibram sole has been reduced to optimize feel. And thanks to the rigid, carbon-fiber midsole, you can expect the same high performance response and control synonymous with the Taiss. Mammut Georganic®3D technology ensures enhanced comfort, with all parts of the boot in contact with the foot designed for specific anatomical features. The elasticated mono-tongue construction helps relieve pressure points on the top of the foot.
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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