Ergonx 4 in 1 Aluminum Cooler Mug - Black - Extra Insulated
Ergonx 4 in 1 Aluminum Cooler Mug - Black - Extra Insulated
- Keeps cans or bottles extremely cold for longer
- High quality materials, just like our boots
- Comes with Coffee / Drink lid attachment to use for your own preferred beverage hot or cold.
- Check Your Size Before Ordering
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- 30 day comfort guarantee
- Free returns if unused
- Free delivery over $49

What is the difference?
Width Guide Info:
What's the Difference Between 2E and 4E Widths?
The difference between 2E and 4E comes down to the width of the boot.
A 4E fitting is approximately 3mm wider across the forefoot compared to a 2E. That small increase gives you a bit more room through the front of the boot.
Our boots are already designed to be wide and deep, so the 2E is considered a wide fit as standard.
How to Choose:
- If you've never had issues with boot width before, go with 2E
- If you've found boots too tight across the forefoot, go with 4E
- If you have a wider foot, choose 4E
- If your foot is regular width, choose 2E
Across all sizes, the key difference is simple:
4E gives you about 3mm more width through the forefoot.
