From the author's README on Thunderstore

Jackass Hoodie

A ReSkate Studio patch that adds the Jackass hoodie.

Installation

Install the mod using the Thunderstore mod manager for the supported game profile.
If installing manually, extract the package contents into the game installation directory, keeping the included Win32 folder and root game files in their original locations.
Launch the game and check the clothing/customization menu for the hoodie.

Package contents

Win32/ — mod asset files
initfs_win32 and layout.toc — game resource files
Icon.png — Thunderstore package icon (256 × 256 PNG)

Install slipe JackassHoodie

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for slipe JackassHoodie and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.