I know they will holed up to Kayaking caring kayaks up or down hills. You?re better off actually going to a store to find a bench. The ?U3? instead of ?U1? seems to be the critical difference between the SD Card error and ?no error?. They are holding up well and haven?t become smelly, as some shoes do when worn without socks or when wet. I feel like the hole for the part that goes between your toes is positioned too far down. The length was fine but the upper part that goes over your foot was so loose and had so much space that his foot slid around and the soles left black marks all over our floor. * Fairly long 3. Thankfully I love all shades of pink, but the case wasnt as pink as shown online! (I run 6-8 miles a few days a week and have zero problems with them staying in my ears)- Sound quality + equalizer are amazing. It was too painful.