September is here and whether you like it or not, the weather is starting to cool off. I'm a little sad that warm weather is dwindling away, but I am psyched to spend more time outside. The cooler weather of autumn makes exercising outside much more pleasant and safe, since you don't have to worry as much about overheating. You do need to wear extra layers though.

Every outdoorswoman needs to have a great fleece. I love this one from Patagonia - the Lightweight R4 Jacketa, because it's simple yet practical.

It's not too big and bulky, so it won't get in the way when you move. Plus the best part is that this fleece is windproof, so you'll stay extra warm. I also like the fact that the shoulders are seamless, so if you are wearing a backpack, the seams won't dig into you. Pockets are a necessity and this jacket has three - 2 hand pockets, and 1 on your chest.

I know that $200 may seem kind of pricey, but remember that even though this jacket is lightweight, it'll still keep you as warm as thicker fleeces because it's windproof. Plus it's a great jacket to layer underneath a hardshell or down jacket for the winter. It's also 100% recyclable through the Common Threads Recycling Program. Order it from Patagonia in Aquatic Blue, Poppy Fields (both shown), Black, and Safety Green.