In June, it could be over 100 degrees in the Central Valley or it could snow. To stay prepared, keep a lightweight packable jacket in your duffel, daypack and gear locker. Look for a product that weighs under 10 ounces, is either water-resistant or waterproof, and folds down to the size of a soda can. Here are three state-of-the-art jackets that fit the bill:

REI Packable Fleet Jacket – This lightweight jacket folds up into its own pocket. It boasts a number of thoughtful details including a pass-through hole for earphones, soft, mesh-lined collar and discrete tab for holding the upper jacket tight around your shoulders. See review.
Target Dry Mac in Sac Jacket – Built in the UK, this waterproof offering from Target Dry has a clever name, solid waterproofing and breathability, and comes in a dynamite set of colors. Despite the fact that it must ship from Europe, the Mac in Sac still delivers good value. See review.
The North Face Better Than Naked Jacket – When the old t-shirt just isn’t enough, The North Face Better Than Naked provides a soft, stretchy extra layer that’s breathable and weather resistant. See review.
All of these jackets pack down into extremely small spaces. In most cases, they’ll fit into a water bottle. Below is the side by side comparison.

Thanks for reading another outdoor gear review from GearGuide. And thanks to REI, Target Dry and The North Face, along with Turner PR for providing product for these reviews. Written by Matt K.