NuYarn DragonWool (for the underwear and thermals) uses a patented method that takes 92% of the spin out of the yarn, taking pressure off the fibers to create more strength, loft, and stretch. It's lightweight, durable, stays warm even when wet, and dries 4x faster than normal Merino Wool.
Merino wool wicks moisture off your skin, and then the polyester face eyelet fabric pulls it from the wool and dries quickly.
The eyelet features on the polyester exterior face store more pockets of insulating air, keeping you warm while stagnant.
While moving, the same eyelets allow more air to escape, making DragonWool highly breathable and light for active use.
Replex Stretch Fabric
The pants use Replex Stretch fabric, making them lightweight and comfortable. The unique weave and construction of the 100% polyester fabric make them flexible, strong, and quick-drying. No Spandex here! Spandex may stretch, but it's heavy and takes forever to dry.
Replex Stretch fabric can stretch in multiple directions, ideal for active use.
The stretch comes from the actual weave of the fibers. Materials like Spandex are completely unnecessary.
0% Spandex means the pants are extremely lightweight and comfortable, with significantly better ability to dry quickly.