Whatasize how much DAD means to you with our very first WhataDad Tee. This super soft and comfortable, royal blue, cotton/poly blended shirt is the perfect gift for any Whataburger loving DAD. Designed and crafted in collaboration with Tumbleweed TexStyles. Product Detail: Material is a 52% Cotton 48% Poly blendPlease review the Size Chart before purchasing. If you are in-between sizes, we recommend sizing up to ensure a comfortable fit.