The inflatable boat is made of PVC  material,which is thick and wear-resistant,which greatly improves the pressure resistance of the air chamber.

Some size for your reference:

2.3m Boat With Air Deck (For 2 person)
Outer Size : 230 x 133cm(90.5 x 52.4 in)
Inner Size : 145 x 60 cm (57.1 x 23.6 in)
Air Chambers Dia : 35cm (13.8 in)
Air Chambers : 2+1
Maximum Load : 440kg (970lbs)
G.W./N.W. : 26.5kg/22kg(58.4lbs/48.5lbs)
Packing Size(cm): 95*60*30cm
Optional Motor : 12V 58lbs/4.0HP

2.8m Boat With Air Deck (For 3 person)
Outer Size : 280 x 133cm(110.2 x 52.4 in)
Inner Size : 190 x 60 cm (74.8 x 23.6 in)
Air Chambers : 35cm (13.8 in)
Air Chambers : 2+1
Maximum Load : 480kg (1058lbs)
G.W./N.W. : 30.5kg/26kg(67lbs/57lbs)
Packing Size(cm):95*65*35cm
Optional Motor : 12V 58lbs/4.0HP/6.0HP