Mediates the transport of CDP-ribitol (PubMed:34015330). Does not exhibit CMP-sialic acid, UDP-galactose and UDP-N-acetylglucosamine transport activity (PubMed:28167211, PubMed:34015330). CDP(out) + CDP-L-ribitol(in) = CDP(in) + CDP-L-ribitol(out) Found in a complex with SLC35A2 and SLC35A3. Belongs to the nucleotide-sugar transporter family. SLC35A subfamily. The translation and the expression of this protein may be maintained under stress conditions thanks to the presence of the upstream ORF in transcripts.