Better than a warm cup of coffee on a brisk fall morning " take the chill off by layering on our lightweight insulated Fall Run Vest. Worn alone or paired with a waterproof, breathable shell, the PrimaloftA(R) insulation is treated for water repellency to keep you warm even when damp from rain or heavy activity. Extremely compressible, it&';s the ideal layer for stowing in your daypack or sling pack.