Boiler suit made of cloth cotton drill Navy Blue 71 cms variety No. 3 Pre- Shrunk quality to IS 177/ 1989 ( 4th revision ) with amendment No. 1 to 5. Thread- Thread polyester matching 40s X 4 cord variety No. 22 of fine quality IS 1720/ 1978 or latest. Button- Matching Nylon Buttons to be used. Size and manufacturers name in cloth label shall be stitched on top of Boiler suit. ( Sample to be get approved before bulk supply )