SPL31: Rectangle Bag w/End Pockets
Fullsized gusseted end pockets; Mesh venting on both sides of body panel

SB33:
w/mesh venting both sides

SB31: Standard Square Bag
w/mesh venting both sides

SPL31: 31/37x14x14

SB33: 33x16x16

SB31: 31x14x14