This black Mammut Moench half zip base layer top is crafted from technical fabric which comprises lightweight and breathable properties. It's shaped with a high neck, long sleeves and features the brand's logo printed in orange on the front and across the back. We've always wondered if there was a base layer top we could wear on the run to work, in work and then to the pub after. Well, it looks like we've found The One in this Mammut number.