Rashi on Genesis 25:25/רש"י על בראשית כ״ה:כ״ה

1אדמוני RED — a sign that he would always be shedding blood (Genesis Rabbah 63:8).

2כלו כאדרת שער means full of hair like a woolen garment that is full of hair. (Old French floche; English flock).

3ויקרא שמו עשו AND THEY CALLED HIS NAME ESAU — every one called him thus because he was made (עשה means to make) and fully developed with hair as a lad several years old.