You need the L/XL. Doesn't matter if your boots are the lowest profile ones out there. the S/M is a tight fit even with low-pro boots in 8.5/9.0.
14 NeverSummer Prospector Splitboard . 14 NeverSummer Proto HD . 13 NeverSummer Cobra . 13 Gnu Space Case EC2PTX. 11 Nitro Team Gullwing
14 Now Drive . 13 Now IPO . 13 Salomon Hologram
14 Flow Hylite . 13 32 Binary