Elasticity is the capacity of a material to regain its initial length after stretching.

A suture‘s elasticity properties depend on:

• The material from which it is made
• The suture diameter
• The suture structure
• The suture production process
  

A suture with poor elasticity will break more easily at the knot.
Good elasticity has obvious clinical benefits: a highly elastic suture is less likely to cut into oedematous tissue and will keep the wound edges approximated throughout the healing process. [1]
Monomax® is a monofilament known for its elasticity and is, in fact, the suture of choice for abdominal wall closure because it adapts well to the often considerable variations in intra-abdominal pressure

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[1] Hochberg J, Meyer KM, Marion MD.; Suture Choice and Other Methods on Skin Closure; Surg Clin North Am. 2009 Jun;89(3):627-41.