Definition of breathable adjective from the Oxford Advanced Learner's Dictionary

 

breathable

 adjective
adjective
BrE BrE//ˈbriːðəbl//
 
; NAmE NAmE//ˈbriːðəbl//
 
(specialist)
 
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(of material used in making clothes) allowing air to pass through Breathable, waterproof clothing is essential for most outdoor sports.
See the Oxford Advanced American Dictionary entry: breathable