The TEE SIERRA140 is a versatile merino t-shirt for men from our functional underwear range. Made from ADVANCED WOOL 140g, the merino t-shirt offers a lightweight and breathable feel, ideal for everyday wear or sports activities. With its classic round neck and simple design, it’s perfect as a base layer for warm winter days or as a lightweight t-shirt for cooler summer days.
The weight of the Sierra base layer is our lightest fibre thickness. It is ultra-light and warming thanks to our ADVANCED WOOL 140.

