Though autumn is only halfway through, winter weather is already on the rise as temperatures are on the fall. And just as well-insulated buildings utilize a complicated layering of wall materials in their exterior envelopes to keep the cold out, foot-travelers too need to layer up their jackets to survive the season. But unlike buildings, which are comfortable carrying immense loads year-round, humans tend to prefer to travel as lightly as possible. That’s where Isaora’s insulated shirts come in. Utilizing Primaloft Gold insulation in their design, these shirts help wearers retain heat without sacrificing comfort, thanks to an ultra-slim design. Billed as “one of the lightest and warmest synthetic fills on the market,” its incorporation into the top barely adds any heft, keeping the figure of a regular button down shirt instead of a cumbersome jacket. Its design will help people dress warmer without dressing bulkier, and its unique indigo color options make it both a pragmatic and sharp part of any man’s wardrobe. Isaora’s longstanding commitment to apparel that is durable ensures it will help men brave many winters to come.