To ward off calf fatigue and soreness post workout, look no further than the 2XU Compression Calf Sleeves. Made with PWX FLEX technology, these calf sleeves will keep you feeling fresh so you can train even harder tomorrow.. . Can also be worn during exercise sleeves apply the correct pressure to increase circulation while sedentary or support the calf, shin, and Achilles when worn during activity. Graduated zoning provides greater power and support graduated fit promotes better blood circulation. Seamless construction offers a superior fit and better protection against muscle and tendon damage. Moisture wicking, antibacterial fabric keeps you cool and dry while resisting odors. UPF 50 protects you from the suns harmful rays.