Ultrapak cord is made of 100% cotton, knitted into thousands of tiny loops to form long, interlocking chains. This unique knitted design exerts a gentle, continuous outward force following placement, as the knitted loops seek to open. Optimal tissue displacement occurs in 3–8 minutes. Ultrapak E is impregnated with racemic epinephrine hydrochloride.​

• The original—and smallest—knitted cord
• Provides rapid tissue displacement, detailed margins, and quality impressions
• Facilitates easy packing and stays placed better than any twisted or braided cord
• Compresses upon packing then expands for optimal retraction
• Does not entangle in diamond bur
• Bright colors facilitate easy location and removal
• Without epinephrine
• High carbon steel blade ensures a clean cut
• Thin plastic gate prevents cord from falling into the bottle upon cutting
• Ruler printed on label provides easy cord measurement​