This pocket has one compartment allowing stowage space for spare masksor the perfect space to fit the CDSE1SEE-ME DSMB. The pocket is securedby strong Velcro and fastened together with a 25mm side release buckle. There is also a webbing loop at base of the pocket for attaching a shackle formounting external accessories. The pocket is fastened to the BC/Wing with reinforced webbing loop which thread on to the 2" webbing waist strap. The accessories pocket is made from a strong cordura.