Built for fast-paced adventures and everyday wear, the Mammut FlexCore UltraLight Insulated Vest delivers reliable warmth without weighing you down. Designed with flexible insulation and breathable fleece side panels, this men’s outdoor vest adapts to movement and changing temps without overheating.
- Pertex® Quantum Air shell resists wind while remaining highly breathable
- Elastic Polartec® Power Grid™ fleece inserts offer mobility and comfort
- Filled with 40g Ajungilak OTI stretch insulation for warmth that moves with you
- Compressible design stows inside its own front pocket—ideal for packing light
- Backpack-friendly zippered pockets and smooth 2-way zipper for all-day utility
Whether you’re layering up for cold-weather training or need a cheap packable vest for hiking, FlexCore delivers the performance you expect from Mammut.
Michael Bishop (verified owner) –
I wore this on a winter trail run and it kept me warm without overheating. One of the best insulated vests for men I’ve ever tried.
Heather Clarke (verified owner) –
The material feels amazing, and it’s super breathable even when I’m layered up. Perfect fit for hiking and mountain biking.
Ashley Reed (verified owner) –
Impressed with how lightweight and packable it is. Great men’s outdoor vest that doesn’t feel bulky at all.