Osprey Metron 35 Backpacks Metron 35 is a fashionable commuter pack with lots of convenient features like an integrated rain cover, large cell phone pocket and key pocket with retractable clip on the shoulder straps. Metron U lock pocket, Metron blinker light attachment, Metron cell phone pocket, Metron front panel pocket, Metron helmet attachment 1, Volume S/M: 1920 cu. in. 32 liter, Volume M/L: 2100 cu. in. 35 liter, Weight S/M: 3/2 lbs/oz 1.42 kg. Weight M/L: 3/5 lbs/oz 1.50 kg. Dimensions 20 x 14 x 10 in,