Let me tell you how pissed I was when my kitties chewed through a few spots on an $80 laptop charger. As soon as I bought another charger and (wrongly) forgot it, they chewed on the new one! I quickly googled cable protectors and found this one from Amazon Prime! I repaired the cracks with Sugra Clay (self-aligning rubber) and then inserted the cable into this product. It took some time but it's worth it. The open areas at both ends are well protected by the sugar. I will add deodorant to the cable if they chew it but so far they have ignored it! It easily fits over the smaller portion of the MacBook Pro charger. I'll update this review when I talk about the other half. Sure, they could still chew on it, but now that the cord isn't like a flimsy piece of string (an enticing toy), they've left it alone to pursue other, less expensive ones. objects! *fuh*