Muck Boots Chore 2K boots have both developed splits at the back of each boot immediately above the reinforced heel box. Also peeling of vertical reinforcement strip on the back of one, and both boots have the lining torn and detaching at the heels. Only 13 months old and used for only a few of those months two or three times a week. Muck Boots customer service don't want to know. Looks to me like fundamental design or production faults. So the boots fail with limited use and no customer backup or support if you're just outside the 12 month warranty period, can't recommend the company or it's products, very poor.