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An insulated jacket is one of the most versatile pieces of kit in any NZ tramper's wardrobe. Whether you're layering up for a cold ridge crossing on the Routeburn, pulling on warmth at a hut after a long day, or staying comfortable at camp, the right insulated jacket keeps you functional when temperatures drop. The two decisions that matter are down versus synthetic, and fill power.
Our insulated jacket range is led by Rab — technical jackets built for the demands of NZ tramping. From the packable Microlight Alpine through to the Xenair synthetic range, Rab covers every scenario from hut layering to serious alpine use.
Down vs Synthetic Insulation
Down offers unmatched warmth-to-weight ratio and compresses small — valuable when every gram in your pack matters. For dry conditions and clear alpine days in NZ, down is hard to beat. The limitation is performance when wet: untreated down collapses and loses warmth rapidly. Rab's Hydrophobic Down treatment improves moisture resistance significantly, but always wear your waterproof shell over a down jacket in genuine NZ rain.
Synthetic insulation performs better in wet conditions — it retains more warmth when damp and dries faster. Note: Rab's Xenair range is synthetic insulated, not down — an important distinction when choosing between Rab options for NZ's frequently wet conditions.
Fill Power: 600, 700, 800+
Fill power measures down loft in cubic inches per ounce. Higher fill power means lighter weight for equivalent warmth. 600-fill is warm and affordable; 700-fill is the sweet spot for most tramping; 800+ is premium and ultralight. The Rab Microlight Alpine uses 750-fill hydrophobic down — an excellent balance of warmth, weight, and wet-weather resilience for NZ conditions.
Layering for Tramping
An insulated jacket is your mid-layer — worn over a base layer and under your waterproof shell when stopped or in cold conditions. Remove it when you start moving hard to avoid overheating. A jacket that packs into its own pocket is far more convenient to manage on the go.
Browse our full range of insulated jackets, or pair your mid-layer with a quality waterproof shell to complete your layering system.
Frequently Asked Questions
Read our complete Insulated Jackets NZ buying guide for detailed advice on down vs synthetic, fill power, hydrophobic down, and top picks.