221B Tactical Equinoxx K2 Thermal Baselayer - Men's Black Medium. It retains body heat blocks wind and resists rain. It's breathable so you dont overheat after coming in out of the cold. Thanks to its special material and construction it also gives you the flexibility and freedom of movement to perform at your best at work or play. K2 is ideal for anyone who works outdoors and could benefit from freedom of movement as well as protection from cold windy and wet weatherfrom postal workers and courier drivers to traffic and school crossing guards; from cable installers and linesmen to construction and oil rig workers. K2 is also great for any kind of outdoor recreational activity such as hunting fishing hiking camping golf skiing ice skating bird watching....You name it It's also good for motorcycle riders who need to block the cold wind. Police and security personnel who already have our Stage 3 as a body armor base layer may want K2 for their cold-weather leisure activities. Specifications for 221B Tactical Equinoxx K2 Thermal Baselayer - Men's: Manufacturer: 221B Tactical Length Alpha: Regular Sleeve Length: Long Sleeve Age Group: Adults Apparel Fit: Regular Gender: Male Color: Black Application: Outdoor Fabric/Material: Triple Layer Fabric Pockets: No Quantity: 1 Fire Resistant: No Sleeve Type: Long Sleeve Tactical: No Reflective/High Visible: No Features of 221B Tactical Equinoxx K2 Thermal Baselayer - Men's Full 360 grid thermal protection Maximum body heat retention Temperature rating: sub 15 F / -9.45 C Superior mobility Water resistant Wind blocking Breathable for coming in out of the cold Extended compression sleeve cuffs Extended torso length - stays tucked in Mock neck design Package Contents: 221B Tactical Equinoxx K2 Thermal Baselayer - Men's 221B Tactical EQXK2T-M-BLK: Equinoxx K2 Thermal Baselayer - Men's Black Medium