Okay, so I don't go to the gym. Instead, I opt for the gymnasium of Mother Earth. I can get in as much cardio as I want, and nobody ever fights me for the weights!

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

A lot of our activities are done spontaneously, and we never quite know what terrain we're going to wind up in. Especially living in San Diego and road-tripping frequently, we can go from beach to desert to the snowy terrain of Julian or Mammoth in a few hours. We pack snow clothes to change into, but sometimes we're just taking a really quick jaunt outside to find a bathroom along the way, dashing through a trail or getting something to eat and I don't feel like fully gearing up. That's when I pull my gym bag out of the trunk.

We're working with PUMA and it just so happens that my gym bag and all the stuff in it is PUMA gear. When I was a gym rat in high school I had PUMA everything, so that's what I've gravitated towards now that I've gotten back into fitness as a mom. The stuff is durable, good for a variety of situations, and not too expensive – especially since I nab it at the PUMA Outlet Stores near our home.

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

Earlier this week we went from San Diego to Wyoming in the span of a single day, powering through the night and not stopping to change. That's how I came to find myself in the middle of a mountain range, six degrees outside, wearing a dress and sandals. My friends were like, “Chelsea, do you have ANY IDEA where you are?”

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

I, of course, reached for my gym bag.

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

First things first, I have a nice pair of winter ruggedized suede shoes and socks that work for just about any weather. They're not as intense as my actual snow boots, mind you, but they work well for my go-anywhere bag when I'm not sure what I'll be up against.

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

Next, polarized sunglasses are a must for any bright summer day or glaring white winter hillside. Most polarized sunglasses are really expensive, but these ones I got from PUMA are cheap enough that they can be easily-replaced if they get damaged or lost in the course of our adventures.

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

And obviously, a beanie. My grandma always told me that if you keep your head warm, the rest of your body will be fine. She had me some scientific explanation about heat rising and stuff. Either way, beanies are badass.

All the stuff to keep in an (outdoor) gym bag so you can be prepared for whatever weather strikes.

Finally, the bag itself is a freestyle duffle bag with lots of pockets, a body strap and side vent zippers, perfect for airing everything out OR zipping it all up to stay water-tight if need be. The bag has a ton of carabiner clip slots and has also become my theme park adventure bag, since it has tons of space and slips over my stroller handle with ease.

All the stuff to keep in an outdoor adventure gym bag so you can be prepared for whatever weather strikes.