FOUR® Essential Skull Cap Black / White The FOUR® Essential Skull Cap is a precision-cut, performance-grade head layer designed for daily wear, training, recovery, and movement. Lightweight, breathable, and perfectly contoured, this piece functions as both an athletic essential and a refined uniform staple. Engineered to sit clean under helmets, hoodies, and outerwear, it delivers a secure fit without bulk — making it ideal for athletes, creatives, and those who live in motion. Minimal by design. Purposeful by nature. This is not an accessory. This is part of the uniform. Details • Lightweight stretch performance fabric • Smooth contoured crown with center seam shaping • Moisture-wicking and breathable • Designed for training, recovery, and everyday wear • Low-profile fit — perfect under helmets and hoodies • Signature FOUR® circular mark embroidery • Unisex Colorways Black — Core Uniform White — Core Uniform