Air Cushion Midsole
The patented Merrell Air Cushion Midsole absorbs shock and adds stability. It is
found exclusively in Merrell footwear. The Air Cushion compresses on heel strike
to absorb shock up to four times the body’s weight for unmatched support and
comfort. In addition, the Air Cushion creates a pronounced heel cup, which keeps
the heel centered in the boot and helps stabilize the foot. In short, it offers
the comfort and cushioning of a running shoe, with the stability and control needed
for backcountry travel. No bladders or capsules to pop or explode!