FEATURES of the Mountainsmith Focus Pack Removable microfibre lens cloth Cover flap with side release buckle Front panel with expandable mesh pocket Detachable shoulder strap with sliding pad Water resistant exterior fabric panels Belt attachment carry option (SM) Rear notepad sleeve carries Peterson's Field Guide (MD and LG) SPECIFICATIONS of the Mountainsmith Focus Pack 500d S-Kodra High Tenacity Nylon 5000mm PU 210d Liner Atlilon Foam SPECIFICATIONS for Small Weight: 6 oz / 0.17 kg Dimension: (H x W x D): 6 x 4.5 x 2 in. Interior Dimension: 5.5 x 4 x 1.5 in. SPECIFICATIONS for Medium Weight: 9 oz / 0.26 kg Dimension: (H x W x D): 9 x 7.25 x 2.5 in. Interior Dimension: 8.5 x 6.75 x 2 in. SPECIFICATIONS for Large Weight: 12 oz / 0.34 kg Dimension: (H x W x D): 10.25 x 9 x 3.5 in. Interior Dimension: 9.75 x 8.5 x 3 in.