thanksFrom my experience they hold up beyond well. I’ve worn the sports band almost exclusively for over 3 years now on series 0-4. They clean well. It will give A little the more it’s worn. I wouldn’t say it stretches by any means but simply loosens up which to me, makes it even more comfortable. It is by far my favorite strap apple offers. As for the hook and loop part I’ve had no issues the hole doesn’t stretch out and the end stays tucked in.