Suri is one of two breeds of the alpaca, the other being the huacaya. Of 3.7 million alpacas worldwide, less than 10% are thought to be of the suri breed. One study found that suris could be reliably distinguished from huacayas by looking for a low frequency of hairs less than 35 micrometers in diameter, as well as fewer hairs with more than eight cuticular scales. Suris may be bred for the lustre of their coats.
- Atav, Rıza; Türkmen, Fatih (2015). "Investigation of the dyeing characteristics of alpaca fibers (Huacaya and Suri) in comparison with wool". Textile Research Journal. 85 (13): 1331–1339. doi:10.1177/0040517514563727.
- Valbonesi, A.; Cristofanelli, S.; Pierdominici, F.; Gonzales, M.; Antonini, M. (2010). "Comparison of Fiber and Cuticular Attributes of Alpaca and Llama Fleeces". Textile Research Journal. 80 (4): 344–353. doi:10.1177/0040517509337634.
- Lupton, C.J.; McColl, A. (2011). "Measurement of luster in Suri alpaca fiber". Small Ruminant Research. 99 (2–3): 178–186. doi:10.1016/j.smallrumres.2011.03.045.