try to heat mold them as nike has offered
Step 1: Fill a snowboard sock with uncooked rice and tie it off at the top, then microwave it for 2 minutes on high heat. (DO NOT MICROWAVE YOUR ACTUAL LINERS)
Step 2: Remove the footbeds from the boot and slide the warm sock filled with rice into the boot for 10 minutes,
making sure the sock is pushed all the way to the toe box of the boot. (If there is too much rice in the boot it might be hard to get it way into the toe box, adjust as necessary.)
Step 3: Remove the sock, put the footbeds back in, then lace the boots up on your feet and stand/walk around the house for 15 minutes.