Softshell nylon OWB holster, 600D grade nylon. Will technically be able to accomodate a belt up to 75mm or 3" in width.
The webbing that folds overhead and serves as the primary retention, preventing the magazine from freely fropping out if manoeuvering around in a tactical scenario or inverting the pouch otherwise. The width of this pouch does accomodate for a double stack, and as illustrated, it will accomodate the 14 & 16 shot BLOW magazine that typically comes with most of the BLOW, RETAY, EKOL and KUZEY models, however, this magazine needs a little bit of encouragement to fit past the lip of the pouch. Most gas guns that replicate double stack magazine profille pistols, should have magazines that will likewise fit in this pouch. 
Most of your BERETTA, GLOCK, S&W, RUGER, TAURUS etc magazines should fit in here, though contact us first if unsure, or otherwise, check the dimensions beneath. 

This is available in MOLLE on request, just reach out to us in that regard.

Otherwise, the retaining mechanism is a 45mm² velcro, male to female, that retains the flap to the pouch.

The flap itself is double layered webbing, btw, measuring nearly 50mm wide.

The depth of the pouch is 100mm, w/ a hole dimension of about 40x20mm once broken in.

The trimming on this pouch is really nice and does round the holster off professionally.