M-9 Pertex Insulated Midlayer
The M-9 Pertex Insulated Midlayer pairs a lightweight Pertex 20D Quantum shell with warm PrimaLoft® Gold Eco insulation for dependable comfort on the move. Stretch grid fleece side panels add mobility and airflow, while the hood, chin protection, and chest and hand pockets make it a practical standalone piece or a layer under a shell.
- World
- ACTIVE
- Shield
- Light Protection
- Where to use
- Everyday, Hiking, Skiing, Snowboarding
Reviews for M-9
Pertex Insulated MidlayerIn depth
- Lightweight insulated midlayer
- Suitable as a standalone piece or layering garment
- Pertex 20D Quantum outer fabric
- PrimaLoft® Gold Eco insulation
- Hood
- Chin protection
- One chest pocket
- Two hand pockets
- Stretch grid fleece side panels under arms
- Designed for comfort, mobility, and airflow
- Shell: 100% nylon ripstop
- Fleece: 93% polyester, 7% elastane
- PrimaLoft® Gold Eco, 40 g, 100% polyester
- YKK zippers
- wash easy care 30 °C
- use mild detergent only
- do not use fabric softener
- wash inside out
- wash separately
- wash with fasteners closed
The M-9 is a lightweight insulated midlayer built to perform both as a standalone piece and as a reliable insulation layer across a wide range of outdoor activities. Adaptable and versatile, it delivers dependable warmth without unnecessary weight, making it easy to bring along whatever the day holds. PrimaLoft® Gold Eco insulation provides efficient thermal comfort that holds up as conditions change.
Built from a Pertex outer fabric, the tightly woven face balances light protection with excellent breathability, while its engineered yarn structure adds durability without adding bulk. Stretch grid fleece side panels under the arms enhance comfort, mobility, and airflow where you need it most. The hood, chin protection, one chest pocket, and two hand pockets round out a practical, layering-friendly design finished with YKK zippers.
Minimalist design and refined lines reflect The Mountain Studio's commitment to Swiss alpine engineering and timeless style. The Pertex shell and PrimaLoft® Gold Eco insulation are chosen for durability and longevity, supporting years of reliable use and repairability without compromising performance.
Available in Black Onyx, the M-9 moves easily between active days in the mountains and everyday cold-weather wear. Its ergonomic fit and lightweight warmth make it a versatile insulated midlayer for skiing, hiking, and layering under a shell. This high quality Pertex insulated midlayer is trusted for dependable comfort and breathability in demanding conditions.
How does the M-9 fit, and should I size up or down?
Can I wear the M-9 on its own, or is it only a midlayer?
Is the M-9 warm enough for active days in the mountains?
Is it suitable for everyday wear?
What do the stretch grid fleece side panels do?
How should I care for the M-9?
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Detail view of The Mountain Studio M-9 Pertex Insulated Midlayer in beige, showing the technical ripstop nylon shell, zippered chest pocket, and stretch grid fleece side panel with visible Pertex branding.
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Rear view of The Mountain Studio M-9 Pertex Insulated Midlayer in beige, showing the ergonomic hood, minimalist sleeve patch, and technical ripstop nylon shell, worn outdoors in a mountain setting.
