PVC (Polyvinyl Chloride) = Features are strength and durability.
TPU (Thermoplastic Polyurethane) = Features: elasticity, transparency and resistance to oil, grease and abrasion. More this material have a reduced volume of pack.
D (Den) = It is a unit of measurement for the density of fabric. Than indicates the mass in grams for 9000 meters.
PVC:
(Ultra Light) 70 D 0,21 mm
(Heavy Deauty) 500 D 0,50 mm
(Heavy Deauty Plus) 500 D 0,60 mm
(Heavy Deauty Extreme) 1000 D 0,90 mm
TPU:
(Ultra Light) 70 D 0,13 mm
420 D 0,30 mm
(Heavy Deauty) 600 D 0,40 mm
(Heavy Deauty Extreme) 840 D 0,45 mm