With the weather about to transition into cooler temperatures, it's time to grab a weighty long sleeve tee to throw into the layering rotation. Outlier has released their GD Cottonweight Merino Longsleeve, which combines a cotton outer face and merino inner to create a thermoregulating piece that's perfect for just about any weather. Each long sleeve is also garment dyed and pre-washed for softness and you've got all the technical characteristic of merino. 

$160, outlier.nyc