Are you hiking, traveling, or adventuring this year? You need Sambob's Alpha 90 pants. These jogger style fleece pants have a 1 inch elastic waistband with loose fold over elastic cuffs. Joggers made from Alpha run large. Sambob recommends sizing down from the pant size you normally buy.

These active fit pants are perfect for sleeping, insulating on a cold morning, or lounging around on a day off. They are so light you'll barely even notice them in your backpack since they about the same as a couple Clif bars but will last you a lot longer than those 2 bars. A large comes in at a mere ~4.6 oz/130 g. 

Sambob's Polartec® Alpha Direct fabric is: 

To determine your size, checkout the photo sizing chart.