Why ZoneKnit™ Merino Outperforms Synthetics for High-Intensity Hikes

July, 2025 | icebreaker

Discover how icebreaker’s ZoneKnit™ technology uses body-mapped merino wool to regulate temperature, resist odours, and keep you dry—naturally. Perfect for trail runners, hikers, and multi-day adventurers.

The Science Behind ZoneKnit™: Engineered for Performance

Not all merino is created equal. While traditional base layers offer even insulation, ZoneKnit™ strategically varies knit density to:

✅Boost breathability in high-sweat zones
✅Retain warmth in core areas
✅Reduce weight without sacrificing durability

"I wore the same ZoneKnit™ top for a 5-day NZ Great Walk—no stink, no chafing, just consistent comfort." – Emma, Trail Runner & icebreaker Lover

7-Day Wear Test: Merino vs. Synthetics

We challenged two hikers to wear icebreaker’s ZoneKnit™ Merino and a leading synthetic base layer for a week without washing. Results:

Factor	ZoneKnit™ Merino	Synthetic
Odour Resistance	Minimal smell	Strong Odour by Day 3
Moisture Wicking	Stayed dry	Trapped sweat
Temperature Control	Adaptable	Overheated

Why it matters: Merino’s natural keratin fibers neutralize bacteria (the cause of Odour), while synthetics trap sweat and bacteria.

How to Pair with ZoneKnit™ for All Conditions

1. Base Layer: 125 ZoneKnit™ for moisture control
2. Mid Layer: 200 Realfleece™ Descender for lightweight and warmth keeping
3. Shell: Wind-resistant Shell+™ Jacket for alpine gusts

Real Adventurers, Real Feedback

"I switched to ZoneKnit™ after my synthetic top rubbed raw spots during a 50km ultra. Zero irritation, even after 12 hours." – Mark, Ultra Runner

Ready to upgrade your kit? Shop ZoneKnit™ or explore our Layering Guide for personalized recommendations.