SOMA AirBag Designs™ are designed and produced with 100% Sonic Welded Seams along with 600 Denier Ballistic Polyester material with a triple coating of Polyester Vinyl Chloride increasing the strength by another 25%. This results in strength comparable to 750 denier material. The Tail, Nose & Rail areas have additional reinforced 1000 Denier PVC coated material over the 600 Denier for bullet proof strength to these more exposed areas. A simple-to-use vinyl cement Repair Kit and fabric swatch is included with each bag just in case of emergency though. Repair Kit is good for several uses if need be.