Blue Slip-Ons

Appearance
The Blue Slip-Ons are a pair of dark blue canvas slip-ons with a thin stripe of lighter blue at the top of the tongue. The interior is white, the sole is yellow-orange, and the heel is a slightly darker blue. Krak-On's white/hot magenta name patch are in their talons while their logo is under the yellow sole.

Splatoon 3
The Blue Slip-Ons returned in the Chill Season 2022 update on 2022-12-01.

Trivia

 * At just, the Blue Slip-Ons are the cheapest purchasable gear with Bomb Range Up and Sub Power Up and are tied with the Red Slip-Ons for the cheapest purchasable shoes. They are tied with the Red Slip-Ons, Sunny-Day Tee and Rainy-Day Tee for cheapest Krak-On gear, and tied with the Red Slip-Ons, Sunny Day Tee, Rainy Day Tee, B-ball Headband and Tennis Headband for cheapest purchasable gear overall in Splatoon, but not Splatoon 2, because of the Swim Goggles.
 * In late July 2017, the Blue Slip-Ons accidentally appeared in SplatNet 2 with Ninja Squid as an ability, which is normally only allowed on Clothing.
 * A similar mistake has also happened for the Blue Slip-Ons, where at one point they would appear in SplatNet2 with Swim Speed Up, which is normally impossible since that is the favored ability of the Krak-On brand.