A lightweight men’s merino wool baselayer shirt, the 200 Zone Long Sleeve Crewe features strategic mesh panels for active ventilation.
Icebreaker says:
A stretchy merino baselayer shirt ideal for long, high-output days on the bike, trail, skis or the rock, the updated 200 Zone Long Sleeve Crewe is the ultimate lightweight technical baselayer top. The Zone features our BodyfitZONE™ construction, which combines lightweight, odor-resistant stretch merino wool with strategically placed merino mesh panels to help regulate temperature during stop-and-go days on the trail or in the mountains. Raglan sleeves and underarm gussets allow for unrestricted range of motion, and flatlock stitching eliminates chafing during dynamic days out in nature.
Icebreaker's 200 Zone LS Crewe is a great base layer providing next to the skin warmth and breathability for active days on the hill. The 200 range is the mid range for warmth and thickness from Icebreaker.
The zoned construction provides greater breathability under the arms and on the back when working hard. The flip side of this more open weave is it will let cold air through more easily, something to be aware of if you stop moving with a chilly wind.
The merino wool with its natural odour resistance makes it a good choice for multi day use. The top is a slim and athletic fit. The flat lock seams are a useful feature to reduce chafing when on the move.