You move around while you work on boulder problems, so your pad should be easy to maneuver. The Metolius Session II crash pad has several updates to the previous version and still weighs only 9 lbs.
Features
Redesigned flap closure system makes the pad easier to load; it reverses to cover up the shoulder straps while you're bouldering
2 new drag handles make it easier to position the pad while it's unfolded
Tough exterior fabric stands up to regular use outdoors; carpeted logo gives you a place to wipe your shoes clean
Padded shoulder straps make it easy to carry in to your favorite problems; waist belt included