Machine washing in a top loader is not advisable, the agitator does have a tendency to catch on the sheepskin and tear the fibres when wet. Gentle cycle, cold water using a product like Mattes MELP® or Leather Therapy® LeatherLaundry Solution in a front loader is preferable. For pads being used day to day I find it easiest to hose the cotton whilst wet and brush the sheepskin section once dry. Dry out of direct sunlight.
Please don't machine wash boots with rhinestones or glitter detail as the agitation will damage them.
Hose of the outer if muddy/sandy along with your horse. Treat the patent outer with care - a quick brush using soapy water will be all they need. Dry in the shade.
It is not advisable to wash in the machine as horse people seem to think this means jamming in with girths, halters etc. etc. Please don't! If you absolutely must - place in a washing bag, cool, front loader and on the gentlest cycles (Aka like you wash delicates!). Make sure you do all the hook/loop up! Simply twist the elastic and voila! You can fold the strap back up to it's furry side on the boot.
Treat your Hufglocken products with care...and they will love you back!! :)