The Feathered Friends Eos Down Vest is a simple, well-constructed, well-fitting down vest with a high warmth-to-weight ratio. The Eos Down Vest is, as you might suspect, the vest version of the Feathered Friends Eos Down Jacket. That jacket is a popular piece of apparel that BPL jacket-guru Max Neale once referred to as “arguably the best down jacket on the market.” The Eos Down Vest seems primed to follow in the Eos Down Jacket’s footsteps by utilizing the same 900 FP down and lightweight shell fabrics as the jacket.