"710 friendly" is a phrase used in the cannabis community to indicate that someone is comfortable with cannabis concentrates and being around someone who uses those products. The term "710" specifically refers to cannabis wax and concentrates. This phrase is similar to "420 friendly," which is a code to let people know that you are cannabis-friendly. "710" is also a stoner holiday celebrated every July 10th all over the world by cannabis consumers. The history behind "710 friendly" and the origin of the holiday are not clear, but it has become a popular term in the cannabis community.