LightWool 140 Undershirt Long Sleeve is a lightweight and soft wool base layer in 100% merino wool, designed for outdoor activities, training and everyday use. Weighing just 140 g/m², it offers superb breathability, temperature regulation and moisture transport, keeping you dry and comfortable whatever your activity. With a snug fit and 4-way stretch, it's comfortable both on its own on chilly days and as a functional inner layer in colder weather. The wool's natural odor-inhibiting properties allow you to wear the shirt multiple times without washing - ideal for hiking, running and travel. A perfect choice for those who want a comfortable, lightweight and versatile base layer for training, hiking and everyday activities.