Supramid is a non-absorbable synthetic suture made of polyamide, available in two different structures depending on suture diameter: Supramid pseudomonofilament consists of a core of polyamide 6.6 and a sheath of polyamide 6, ranging from USP 4/0 to 2. Supramid monofilament is made of polyamide 6 with a range from USP 6/0 to 5/0.