MontBell America, Inc. Ultralight Thermawrap Pants

One of the lightest synthetic insulated pants around, the MontBell Ultralight Thermawrap Pants offers superb warmth at only 10oz (medium). Insulated with 50g of Exceloft, these pants not only retain their warmth when wet; their weight only increases by just 1% when completely soaked. However, with a DWR-coated 15d Ballistic Airlight nylon shell, youd have to fall in the river to get the insulation of these pants wet. Thanks to full-side zips (ankle-to-hip), the Ultralight Thermawraps are easy to put on over all of your other layers. Made for ice and alpine climbing, the Ultralight pants add some much-needed warmth to your fast-and-light ascent.