Brief Explanation About Fencing Uniforms:
The clothing which is worn in modern fencing is made of tough cotton or nylon. Kevlar was added to top level uniform pieces (jacket, breeches, underarm protector, lamé, and the bib of the mask) following the Smirnov incident at the 1982 World Championships in Rome. However, kevlar breaks down in chlorine and UV light, so the act of washing one's uniform and/or hanging it up in the sun to dry actually damaged the kevlar's ability to do the job.
In recent years other ballistic fabrics such as Dyneema have been developed that perform the puncture resistance function and which do not have kevlar's weakness. In fact, the FIE rules state that the entirety of the uniform (meaning FIE level clothing, as the rules are written for FIE tournaments) must be made of fabric that resists a force of 800 newtons (1600N in the mask bib).
JACKET: covering groin and with strap (croissard) which goes between the legs (note that in sabre fencing, jackets that are cut along the waist and exclude the groin padding are also sometimes used), a small gorget of folded fabric is also sewn in around the collar to prevent a blade from slipping upwards towards the neck
KNICKERS: which are a pair of short trousers. The legs are supposed to hold just below the knee.