ASICS Apparel Size Chart It's time to get moving! With a laminated secure media pocket, a reflective bar on the back for low-light visibility, and an inner brief for comfort, the ASICS Performance Brief Woven Short 5.5' is a great addition to your wardrobe for spring training. The fabric is primarily polyester cut in a regular fit. Features: - Drawcord waistband - Comfort inner brief - Secure media pocket - Reflective details - Regular fit - 90% polyester/ 10% elastane