This document discusses English vowel phonemes and their phonetic features. It defines a phoneme as the minimal contrastive sound unit in a language's phonological system. Phonemes are identified by looking for minimal pairs, where words differ by only one sound. Then it provides tables describing the phonetic features of 14 different English vowel phonemes, including their position in words. The features discussed are front/back, high/mid/low, tense/lax, rounded/unrounded, simple/complex, and voiced/unvoiced. Examples are given for each vowel phoneme.