Specification: Strength: Identification: Common Use: Comment: Commercial N/A N/A Main pilot chute pockets N/A Specification: Strength: Identification: Common Use: Comment: MIL-C-43734 500 denier N/A Sport container systems Has a urethane coating on the  inside Specification: Strength: Identification: Common Use: Comment: PIA-C-3953, class 2 1,100 lb, 20 oz/yd 3 x 4 basket weave Stiffening material for containers Uses a melamine resin for stiffness Specification: Strength: Identification: Common Use: Comment: PIA-T-43618 60-75 lb Ripstop weave fabric with adhesive  backing, various colors Field canopy repair May degrade canopy fabric over  time. Figure 3-11.  Elastic fabric, Spandex$^{®}$.  Figure 3-9.  Cloth, nylon, Cordura$^{®}$.  Figure 3-12.  Pressure sensitive adhesive tape—ripstop tape.  Figure 3-10.  Cloth, duck, nylon, ballistic.  One should never be substituted for the other in a repair.  The rigger should have material certification and lot  tractability for any materials used in the repair. The  material certification should additionally identify the type.  [Figures 3-17  through  3-32] The two types may be identified by comparing their edges.  Fold the webbing in half and align the selvage edges. They  should be identical in weave. If they are, then it is shuttle  weave and acceptable for use. If they are not, then it is  needle weave. 3-5