Cloak of Arachnida
Wondrous item, very rare, requires attunement · 2014 rules, SRD 5.1
Resistance to poison; climb speed equal to walking speed, including upside down on ceilings; can't be caught in webs; cast web (DC 13, 2x area) once per dawn.
Also in the 2024 rules (SRD 5.2).