Be Advised: Neither the product info on this page from Irish Setter nor the Irish Setter website makes ANY mention of this boot being waterproof. If you want the waterproof version, looks like you'll need to get the 3875 Soft Paw Waterproof Boot.
<a data-hook="product-link-linked" class="a-link-normal" href="/Irish-Setter-Men-s-3875-Soft-Paw-Lace-up-Boot/dp/B001LK6WTG/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Irish Setter Men's 3875 Soft Paw Lace-up Boot</a>

UPDATE: It looks like Amazon has removed the claim that this boot is waterproof from the product description.