Story Performance arm warmers designed for cold race days Built with a blend of odor-resistant and breathable merino wool, the Brighton Base Layer collection was designed for keeping you warm and dry no matter how extreme your workout gets. With a seamless design and elastane to keep them in place, the Brighton Arm Warmers give you high-speed performance on race days without being irritating. Features No-itch merino wool arm warmers designed for cold race days Merino’s natural properties are breathable and odor-resistant Added elastane keeps them tight on your arms at high speeds Seamless construction prevents irritation or chafing Keep shape and stay in place even when wet Materials 47% merino wool, 28% nylon, 25% polyester Sizing The Brighton Arm Warmers have a regular fit that’s true to size, take your normal size For the best personal fit, compare the measurements of your favorite hoodie to the garment measurements below Garment Measurements S/M L/XL Length 16 17 Circumference Bicep Opening 7¼ 8¼ Circumference Cuff Opening 5 6 All measurements in inches. Care Machine wash warm on delicate cycle Wash with like colors Do not bleach Lay flat to dry Do not use softeners About Tracksmith The runner is a peculiar beast. Trading a warm bed for the morning chill while most others hit ‘snooze’ requires passion, self-discipline, and a desire to push personal limits. Tracksmith is a premium running wear brand dedicated to those out there putting in miles every day—because a real runner knows there’s no such thing as the off-season.