1. Measure the circumference at the widest point of the chest.
2. Measure the circumference of the waist at your narrowest point.
3. Measure the circumference over the seat at your widest point.
4. Measure from the crotch down to the floor.
The updated Back Up Jacket is designed to offer reliable protection across a wide range of outdoor activities. Made from lightweight 3-layer Gore-Tex with the new ePE membrane, it delivers solid waterproofing and breathability, while the soft, moisture-wicking tricot backer helps regulate body temperature throughout the day.
The fit is optimized for comfort and freedom of movement, with a shaped hood featuring rear adjustment and fixed elastic at the front. The outer storm flap is laminated and secured with a snap at the hem and discreet Velcro tabs at the chin. Two-way ventilation zips improve airflow during activity—especially useful when wearing a pack.
Two generous hand pockets offer easy access, and the microfleece-lined inner storm flap feels soft against the chin. A drawcord at the hem seals out wind and rain.
The Bionic™ face textile of this Gore-Tex laminate is made from 100% recycled plastic, 50% collected from the marine and coastal environments of Costa Rica.