Returned product and purchased factory OEM. Real easy to assemble. 11 for him was a bit too snug and went for size 13. Bought these to help my son who is sensitive to loud noises. However, like most other Under Armour compression shirts that Ive purchased this shirt constantly rises from the waist while Im working out. I put them right on my feet the moment I opened the box and it was a beautiful experience. Musik genießt man laut und die Schallschirmung scheint nicht sehr gut zu sein. Excellent sound, strong Bluetooth connection I left my phone downstairs while I had to run to the loo the music carried on without stopping at all. The sound on this baby is good, and the battery life is great. pour la maison au bout d une semaine le talon s est completement use et fendu tres mauvais produit