Our Boxer Shorts provide soothing warmth that may relieve groin and superficial hip discomfort. How do they accomplish this? With Back on Tracks specially designed ceramic-infused Welltex fabric. The ceramic powder reflects your own body heat and creates a soothing far infrared thermal warmth. Mens boxer fabric is ribbed, and comfortable. https://botcanada.com/ sizing charts can be found https://botcanada.com/sizing-charts/