Brooks Canopy Jacket Women's (Old Version) With lightweight, water-resistant coverage and a restriction-free fit, the Brooks Canopy Jacket is the perfect companion on wet or chilly runs. This running jacket packs into a built-in mesh backpack, so you can stay ready for whatever the weather may bring. Breathable DriLayer® Seal fabric lets excess heat out without letting the elements in. Stuffs into a built-in mesh backpack, helping you stay ready for times the weather takes a turn for the worse. Keep valuables safe with a zippered pocket at left chest and two hand pockets at the waist. Sizing Small: 32.5-34.5" chest Medium: 34.5-36.5" chest Large: 37.5-39.5" chest X-Large: 40.5-43" chest *Measurements refer to body size, not garment size.