you can insert an extra flat insole under the current one

developed for hiking

Magma 630 Duck down with 650 Cuin filling in the 90/10 ratio ensures excellent loft and thus great packability while maintaining excellent thermal comfort down to -12°C

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Alpha Pant (W) Summit Poles you can insert an extra"Setting the standard for lightweight, durable protection, the Alpha is designed for confident travel in rugged, unpredictable alpine environments. Made with waterproof, windproof, breathable 3L GORE TEX with our ultra light, ultra durable Hadron LCP (Liquid Crystal Polymer) grid fabric on the face , The Alpha's resistance to wear matches pants made from much heavier materials. The innovative waist adjuster is secure and fits easily under a harness or