Of all the lightweight performance inner layers, many outdoor enthusiasts consider Patagonia's Silkweight Capilene to be among the finest in comfort and moisture-wicking performance. Silkweight is often regarded as the four-season weight--light enough to wear alone on summer backpacking and camping trips, breathable enough to wear as a base layer on high-aerobic winter workouts. This year Patagonia revised their men's short-sleeved t-shirt design with casual styling accents that easily transition from a technical base layer to a casual pullover. The rib-knit collar is wider and more prominent, giving the shirt a classic crew styling. Down below Patagonia shortened the length of the hem so you can wear it untucked without looking too techie. The fit remains the same so you can still enjoy the same airflow characteristics found in the previous silkweight incarnations.