Core Muscle Fit T-Shirt – Air Blue The 11 Degrees Core Muscle Fit T-Shirt u2013 Air Blue looks and feels fantastic with the use of smooth, lightweight fabric constructed to enhance your shape. This Tee is a wardrobe essential, part of theCore Collection, which is highly popular and a staple piece for any outfit. The T-Shirt is perfect for daily wear when paired with Jeans or Joggers. Why not complete the look? Take a look at theseSkinny Jeans. Muscle fit. Smooth, lightweight fabric. Rolled up sleeve cuffs. Curved hem. Crew neck. 11 Degrees logo. 95% cotton 5% elastane. Model’s height: 183cm/6ft. Model is wearing: size medium.