Final answer:
Bertha Mason rips Jane's wedding veil in the novel Jane Eyre.
Step-by-step explanation:
The item of Jane's clothing that Bertha Mason rips one night is her wedding veil. This dramatic event occurs in Charlotte Brontë's novel Jane Eyre. Bertha Mason, the first wife of Mr. Rochester, who is kept hidden due to her madness, sneaks into Jane's room and tears the veil in two as a symbol of her presence and the impediments to Jane's impending marriage.