Nematode cuticles are composed largely of collagen-like proteins. The cuticle functions both as an exoskeleton and as a barrier to protect the worm from its environment. Involved in body morphogenesis (PubMed:21094156). Collagen polypeptide chains are complexed within the cuticle by disulfide bonds and other types of covalent cross-links. Localizes in stripes along the alae. Belongs to the cuticular collagen family.