Summit Grindelwald 640
- Free Shipping
- ASTM & CE Guarantee
SPIEZ fit true to size for most customers. If you have wide feet or are between sizes, we suggest you choose one size up for all styles.
| US (M) | EU | UK | MX | FOOT LENGTH（mm） | ||
| 6.5 | 39 | 5.5 | 5 | 241 | to | 246 |
| 7.5 | 40 | 6.5 | 6 | 248 | to | 253 |
| 8 | 41 | 7 | 6.5 | 255 | to | 260 |
| 9 | 42 | 8 | 7/7.5 | 261 | to | 266 |
| 10 | 43 | 8.5 | 8 | 268 | to | 273 |
| 10.5 | 44 | 9 | 9 | 275 | to | 280 |
| 11 | 45 | 10 | 10 | 281 | to | 286 |
| 12 | 46 | 11 | 10.5 | 288 | to | 293 |
Still debating? No worries—our hassle-free 30-day return policy allows you to try us on for size and find the perfect pair.
| Product | Work Boots / Work Shoes / Safety Boots / Safety Shoes |
| Model | 640 |
| Style | Boots / Casual / Fashion / Outdoor / Hiking |
| Toe Cap | Renton Shield X V2 PC Composite Toe |
| Upper | Abrasion-Resistant Oxford + Microfiber + Reinforced TPU |
| Function | Anti-Smash, Anti-Slip, Anti-Static, Cushioning and Protection |
| Gender | Men |
| Color | Black-gray |
| Available Occasion | Construction, Maintenance, Manufacturing, Warehouse, Logistics, Gardening, Lumberjacking, Engineering, Work and Daily Wear, etc. |
| Package | A Pair of Shoes (with Environmentally Friendly Packaging Carton) |
· CE/S1 Certified Protection
Meets European safety standards for anti-smash (200J), anti-static and heel energy absorption.
· TriTech Upper Durability
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Oxford weave: 3x abrasion resistance vs. standard canvas
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TPU exoskeleton: Critical stress-point reinforcement
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Microfiber panels: Enhanced flexibility + scuff resistance
· ClimateFlow Ventilation
Breathable foam-padded collar and moisture-wicking lining reduce heat buildup during extended wear.
· Urban-Ready Traction System
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Diamond-tread MD+RB outsole exceeds SRC slip ratings
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Flex grooves enhance natural movement on concrete/gravel
· All-Day Comfort Engineering
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EVA midsole absorbs 82% of impact shock
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Contoured arch support reduces plantar pressure
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18% lighter than traditional industrial boots
· Rugged Sophistication
Charcoal grey tactical design transitions seamlessly from warehouse floors to urban environments.
Wearer-Centric Innovations
✓ Abrasion Armor
Reinforced TPU heel/quarter guards defend against equipment scrapes.
✓ StaticShield Technology
Dissipates 99.7% of electrostatic buildup (<100kΩ resistance).
✓ Rapid-Fit System
Gusseted tongue blocks debris; padded collar prevents heel slippage.
SPIEZ fit true to size for most customers. If you have wide feet or are between sizes, we suggest you choose one size up for all styles.
| US (M) | EU | UK | MX | FOOT LENGTH（mm） | ||
| 6.5 | 39 | 5.5 | 5 | 241 | to | 246 |
| 7.5 | 40 | 6.5 | 6 | 248 | to | 253 |
| 8 | 41 | 7 | 6.5 | 255 | to | 260 |
| 9 | 42 | 8 | 7/7.5 | 261 | to | 266 |
| 10 | 43 | 8.5 | 8 | 268 | to | 273 |
| 10.5 | 44 | 9 | 9 | 275 | to | 280 |
| 11 | 45 | 10 | 10 | 281 | to | 286 |
| 12 | 46 | 11 | 10.5 | 288 | to | 293 |
Still debating? No worries—our hassle-free 30-day return policy allows you to try us on for size and find the perfect pair.
