TM  10-8400-203-23 2-5.  REPAIR  AND  MAINTENANCE  OF  SLEEPING  BAGS,  INTERMEDIATE  COLD  AND EXTREME COLD TYPE Il. – Continued (3) Replacement. Replace by cutting the drawstring at the edge of binding tape where it is attached to the face opening. Cut a length of nylon braid 30 ± 1/2 inches (76.2 ±  1.27 cm) long and fuse cut ends. Knot one end of drawstring with a figure eight knot located 3/8 to 5/8 inch (0.953 to 1.588 cm) from end. At one end  of  casing  pass  unknotted  end  of  drawstring  through  opening  formed  by  a  bartack  and  position drawstring within the casing with the unknotted end protruding approximately two inches from other end of casing and on opposite side of bartack, i.e., not within the opening formed by the bartack. Fold the end of drawstring that is unknotted under 1/2 inch and position folded end even with edge of binding tape and against end of drawstring casing. Bartack or stitch through folded end of drawstring within a 1/2  inch  (1.27  cm)  bartack  or  with  3  rows  of  stitching.  Install  other  drawstring  in  the  same  manner except start from other end of casing. p.  Lubrication.  Use  zipper  ease  stick  (Section  Ill),  apply  lubricant  to  slide  fastener  and  chain.  This  will maintain free sliding action and aid in preventing breakage of slide fastener chain. q.   Alternate   Repair   Method. Repair may also be accomplished through the use of iron-on patches conforming to either Type I or Type II of MIL-C-43677, applied to the exterior of the bag. The repair procedure is as follows: (1) Trim loose threads and frayed edges of the torn or damaged areas. (2) Clean dust and dirt from area with a dry brush. (3) Cut patches to the desired size and shape, such that the patch, when applied will extend 3/4 inch in all directions from the tear or damaged areas. Patches will have rounded corners. (4) Place area to be patched on a wooden or other non-metallic surface not affected by heat of patching. Smooth out by hand. The area to be patched maybe rewarmed with a household electric dry iron set at cotton for 5 seconds or less. (5)  Apply  the  previously  cut  patch:  Apply  heat  either  through  use  of  a  household  electric  iron  or  a commercial type hot press such as Thermopress Model HP-8. If household electric dry iron is used the setting should be cotton and heat should be applied for 8 to 12 seconds using a gentle motion of the iron. If a hot press is used the pressure shall be 20 psi, the temperature 415°F (212.77°C) and the dwell  time  11  seconds.  The  patch  should  be  maintained  in  a  static  condition  for  5  minutes  after application. (6)   The   above   material   may   be   obtained   through   the   supply   system   by   requisitioning   NSN 8305-00-460-4200,  Cloth,  Coated. 2-10