Using these Wolky La Jolla sandals is a breeze. Just adjust the velcro fastenings to get a perfect fit for your feet. Slip them on and enjoy your summer outings. As for maintenance, use a soft cloth to wipe off any dirt or dust regularly. You can also apply a leather conditioner to keep the leather soft and prevent it from drying out. Avoid wearing them in very wet or muddy conditions to prolong their lifespan. When it comes to sizing, remember that the fit is for standard - sized feet with a guideline width size W, so choose your size accordingly.