These mats are wonderful! So simple - wish I'd thought of it first!No more puppies being buried in mounds of bedding by Mum as she reorganises her bed every hour. No finding mum and puppies on the bare whelping box floor with the bedding scrunched up in a corner. Puppies have plenty of 'grip' for little back legs to allow easy feeding. The covers are a dawdle to remove, wash and replace and look as good as new after umpteen washes! Last but not least - this size fits perfectly into a standard shower tray which makes a very hygienic and cheap whelping box. My last maiden Mum whelped in the ensuite shower tray and let me fit some sleep into the first couple of days before she moved on to the whelping box :)